Question

(vi) If two angles ofa triangle are 90° and60° then what
will be the value of third angle.​

Answer 1

Answer:

the value of third angle is 30⁰.

Step-by-step explanation:

let first angle be 'a', second angle be 'b' and third be 'c'.

then by using ANGLE SUM PROPERTY OF A TRIANGLE

angle'a' + angle'b' + angle'a' = 180⁰

so,

60⁰ + 90⁰ + angle'a' = 180⁰

150⁰ + angle'c' = 180⁰

angle'c' = 180⁰ - 150⁰

therefore

ANGLE'C' = 30⁰.

HOPE THIS WILL HELP YOU TO UNDERSTAND.

Answer 2

Use above attachment for your answer

Hope it helps.....