Question

If the two angles of a triangle are 65 degree and 75 degree find out the measure of the third angle ?
40
70
35
50​

Answer 1

Answer :

• Measure of third angle is 40⁰

Given :

• Two angles of a triangle are 65⁰ and 75⁰

To find :

• Measure of third angle

Solution :

• First angle is 65⁰
• Second angle is 75⁰
• Third angle = ?

• Let the third angle be x

As we know that

• Sum of all angles in a triangle is equal to 180⁰

》x + 65⁰ + 75⁰ = 180⁰

》140⁰x = 180⁰

》x = 180⁰ - 140⁰

》x = 40⁰

Hence , Measure of third angle is 40⁰

Verification :

》40⁰ + 65⁰ + 75⁰

》180⁰

Hence , Verified.