Question

State and prove angle sum property of the triangle .

Answer 1

Answer:

Theorem 1: Angle sum property of triangle states that the sum of interior angles of a triangle is 180°. Proof: Consider a ∆ABC, as shown in the figure below. ... Thus, the sum of the interior angles of a triangle is 180°

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Answer 2

Answer:

angle sum property if a triangle is angle A +angkeB+angleC

Step-by-step explanation:

suppose there is a triangle abc where ang. A is 40°,ang. B is68° and ang. c is x°

then to find x we write this:

40+68+x=180°

108+ x =180°

x= 180- 108

x= 72