Question

3.
Find the measure of the third angle of triangles whose two angles are given below
(iii) 40', 80
(1) 116", 30
(1) 38", 102
Find the other acute angle,​

Answer 1

Step-by-step explanation:

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) 38⁰+100∘+x∘

=180∘ x∘

=180∘ −138⁰x∘

=42∘

(ii) 116∘+30⁰+x ⁰

=180∘x∘

=180∘−146⁰x∘

=34∘

(iii) 80∘+40∘ +x∘

=180∘ x∘

=180∘−120⁰ x∘

=60∘

Answer 2

Answer:

180-(40+80)

180-120

=60

180-(116+40)

180-156

=24

180-(38+102)

=180-140

=40

Step-by-step explanation:

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