TOPIC:

PROJECTION OF A SIDE OF A TRIANGLE

• TRIANGLE:A triangle is a polygon with three

edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted A B C.△

A

B C

TYPES OF TRIANGLES

• Acute triangles: Acute triangles are triangles in which the measures of all three angles are less than 90 degrees.

• Obtuse triangles: Obtuse triangles are triangles in which the measure of one angle is greater than 90 degrees.

• Equilateral triangles:Equilateral triangles are

triangles in which all three sides are the same length.

• Right triangles: Right triangles are

triangles in which the measure of one angle equals 90 degrees.

• Isosceles triangles: Isosceles triangles are triangles

in which two of the sides have the same length.

• Scalene triangles: scalene triangles are triangles in which none of the sides are the same length.

• Which of the following triangle is an isosceles?

• A B

• C

The answer is B

• Which of the following triangle is scalene?

• A B

C

Answer is: C

• Can scalene triangle be a right angle triangle ?

• Ans: Yes it is possible .

Q:Can isosceles triangle be a right angle triangle ?

• Ans: yes it is possible .