Enter

To show the dynamic figures properly, the evaluation version of Cabri 3D (V2.0 or abov

e) must be installed.

There are 12 multiple choice questions. Click the letter to answer.

Enter

ABCDEFGH is a cube. Which of the following angle is the angle between planes ABGH and ABCD?

A CAG

B CBG

C CGB

D DBH

1. (Hold down the right mouse button and drag to change the view angle.)

Back

1. Incorrect! Hint: Click and right-button drag the figure to change the view angle. Which angle is the angle between planes ABGH and ABCD?

Next

CBG is the angle between planes ABGH and ABCD.

(Click and right-button drag the figure to change the view angle. )

1. Correct!

ABCDEFGH is a cuboid. Which of the following angles is the angle between planes ABGH and CDHG?

B AGC

C AHD

A DHB

D HAD

2. (Hold down the right mouse button and drag to change the view angle.)

Back

2. Incorrect! Hint: Click and right-button drag the figure to change the view angle. Which angle is the angle between planes ABGH and CDHG?

Next

2. Correct! AHD is the angle between planes ABGH and CDHG.

(Click and right-button drag the figure to change the view angle. )

B OCV

C OMV

A OBV

D OVM

ABCD is a square, M is the mid-point of BC, and VO is the altitude of the pyramid. Which angle is the angle between planes VBC and ABCD?

3. (Hold down the right mouse button and drag to change the view angle.)

Back

3. Incorrect! Hint: Click and right-button drag the figure to change the view angle. Which angle is the angle between planes VBC and ABCD?

Next

3. Correct! OMV is the angle between planes VBC and ABCD.

(Click and right-button drag the figure to change the view angle. )

ABCD is a square, N is the mid-point of AB, and VO is the altitude of the pyramid. Which of the following angles is the angle between planes VAB and ABCD?

B OAVC OBV

A ONV

D ABV

4. (Hold down the right mouse button and drag to change the view angle.)

Back

4. Incorrect! Hint: Click and right-button drag the figure to change the view angle. Which angle is the angle between planes VAB and ABCD?

Next

ONV is the angle between planes VAB and ABCD.

(Click and right-button drag the figure to change the view angle. )

4. Correct!

In the figure CO is the altitude of the pyramid, AOB = 90, M is the mid-point of AB, OP AB. Which of the following angles is the angle between planes ABC and OAB?

B OPCC OAC

A OMC

D OBC

5. (Hold down the right mouse button and drag to change the view angle.)

Back

5. Incorrect! Hint: Click and right-button drag the figure to change the view angle. Which angle is the angle between planes ABC and OAB?

Next

OPC is the angle between planes ABC and OAB.

(Click and right-button drag the figure to change the view angle. )

5. Correct!

B OCBC ONB

A OAB

D OQB

In the figure CO is the altitude of the pyramid, AOB = 90, N is the mid-point of AC, OQ AC. Which of the following angles is the angle between planes ABC and OAC?

6. (Hold down the right mouse button and drag to change the view angle.)

Back

6. Incorrect! Hint: Click and right-button drag the figure to change the view angle. Which angle is the angle between planes ABC and OAC?

Next

ONV is the angle between planes ABC and OAC.

(Click and right-button drag the figure to change the view angle. )

6. Correct!

B ACB

C OCA

A AOB

D OCB

In the figure, CO is the altitude of the pyramid, AOB = 90. Which of the following angles is the angle between planes OAC and OBC?

7. (Hold down the right mouse button and drag to change the view angle.)

Back

7. Incorrect! Hint: Click and right-button drag the figure to change the view angle. Which angle is the angle between planes ABGH and ABCD?

Next

AOB is the angle between planes OAC and OBC.

(Click and right-button drag the figure to change the view angle. )

7. Correct!

In the prism of the figure, ABCD and CDEF are rectangles, BCF = 90. Which of the following angles is the angle between planes ABFE and ABCD?

B AED

C EAB

A DAE

D FAC

8. (Hold down the right mouse button and drag to change the view angle.)

Back

8. Incorrect! Hint: Click and right-button drag the figure to change the view angle. Which angle is the angle between planes ABFE and ABCD?

Next

DAE is the angle between planes ABFE and ABCD.

(Click and right-button drag the figure to change the view angle. )

8. Correct!

B DAE

C DEA

A AEF

D ADE

In the prism of the figure, ABCD and CDEF are rectangles, BCF = 90. Which of the following angles is the angle between ABFE and CDEF?

9. (Hold down the right mouse button and drag to change the view angle.)

Back

9. Incorrect! Hint: Click and right-button drag the figure to change the view angle. Which angle is the angle between planes ABFE and CDEF?

Next

DEA is the angle between planes ABFE and CDEF.

(Click and right-button drag the figure to change the view angle. )

9. Correct!

B DAH

C DCH

A HAC

D DOH

ABCDEFGH is a cube, O is the centre of ABCD. Which of the following angles is the angle between planes ACH and ABCD?

10. (Hold down the right mouse button and drag to change the view angle.)

Back

10. Incorrect! Hint: Click and right-button drag the figure to change the view angle. Which angle is the angle between planes ACH and ABCD?

Next

10. Correct! DOH is the angle between planes ACH and ABCD.

(Click and right-button drag the figure to change the view angle. )

In the figure, ABCD is a rectangle, M is the mid-point of AB, and VD is the altitude of the pyramid. Which of the following angles is the angle between planes VAB and ABCD?

B VMD

C VBA

A VAD

D VBD

11. (Hold down the right mouse button and drag to change the view angle.)

Back

11. Incorrect! Hint: Click and right-button drag the figure to change the view angle. Which angle is the angle between planes VAB and ABCD?

Next

11. Correct! VAD is the angle between planes VAB and ABCD.

(Click and right-button drag the figure to change the view angle. )

B VND

C VCD

A VBD

D VBC

In the figure, ABCD is a rectangle, N is the mid-point of BC, and VD is the altitude of the pyramid. Which of the following angles is the angle between planes VBC and ABCD?

12. (Hold down the right mouse button and drag to change the view angle.)

Back

12. Incorrect! Hint: Click and right-button drag the figure to change the view angle. Which angle is the angle between planes VBC and ABCD?

EndRestart

12. Correct! VCD is the angle between planes VBC and ABCD.

(Click and right-button drag the figure to change the view angle. )