Q10
The measures of the four angles of a quadrilateral are in the ratio 1 : 2 : 4 : 5. What is the measure the biggest angle?
A.
120
B.
30
C.
60
D.
150
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
The sum of a quadrilateral is 360°x + 2x + 4x + 5x = 360°
12x = 360°
x = 30°
Biggest angle = 5x = 5 × 30° = 150°