Question

6. In the figure, if m B=90°, then m=? (1) 15 (2) 18 (3) 21 (4) 12 2 c​

Answer 1

Answer:

12

Step-by-step explanation:

In ∆CBA, Angle B is 90°

By Pythagoras theorem,

CA²=CB²+BA²

(m+3)²=12²+9²

(m+3)²=144+81

(m+3)²=225

(m+3)=√225

m+3=15

m=15-3

m=12