Answer:
a) (2x+18)° = 90°
b) x=36°
c) (3x+6)=114°
Step-by-step explanation:
a) (2x+18)° is 90° because it is a right angle
b) (2x+18)° = 90°
2x=90°-18°
x=72/2
x=36
c) solution 1 :
triangle=180°
180°-90°-24°=66°
straight angle=180°
180°-66°=114
solution 2：
(3x+6)°=3(36)+6
=114°
