Question

1. The measure of three angles of a quadrilatem is 3070" and low. Find out
the measurement of fourth angle.​

Answer 1

Solution:-

Given angles:-

=> ∠A = 30⁰

=> ∠B = 70⁰

=>∠C = 100⁰

=> ∠D = x

We know that sum of all sides of quadrilateral is 360⁰

=> ∠A +∠B +∠C + ∠D = 360⁰

=> 30⁰ + 70⁰ + 100⁰ + x = 360⁰

=> 100⁰ + 100⁰ + x = 360⁰

=> 200⁰ + x = 360⁰

=> x = 360⁰ - 200⁰

=> x = 160⁰

So ∠D = 160⁰