Question

find the value of a​

Answer 1

Answer:

a= 22.5⁰

Step-by-step explanation:

This is a right angle triangle

so 3a + a = 90⁰

so a = 22.5⁰

Answer 2

Step-by-step explanation:

the triangle is in semi circle.

name the triangle ABC

let angle A be 90 as it is a semi circle

then by using SOMAT(sum of an triangle is 180)

u will get the answer