Question

4: The angles of a triangle are in the ratio 3:4:5. What is the measure of the smallest

angle?
A. 15°
B. 30°
C. 45°
D. 750

Answer 1

sum of all angle = 180

given angle = 3X, 4 X AND 5 X

3 X + 4 X+ 5 X = 180

12 X = 180

X = 180/ 12

X = 15

X= 15 IS apply to given angle.

3 X= 3 ×15 = 45

4 X= 4 ×15 = 60

5 X = 5 ×15 =75

ANS; The smallest angle is 45

Explanation: