Question

d)The measure of three angles of triangles are given. Let's identify the type according to angles. i) 120°,30°,60°. li)75°,70°,350​

Answer 1

Answer:

We know that the sum of the interior angles of a triangle is 180

∘

. Let third angle in all the given triangles be x

∘

. Therefore,

(i) 38

∘

+100

∘

+x

∘

=180

∘

x

∘

=180

∘

−138

∘

x

∘

=42

∘

(ii) 116

∘

+30

∘

+x

∘

=180

∘

x

∘

=180

∘

−146

∘

x

∘

=34

∘

(iii) 80

∘

+40

∘

+x

∘

=180

∘

x

∘

=180

∘

−120

∘

x

∘

=60