51o
64o
77o
103o
Correct answer is D
cos\(\alpha\) = \(\frac{10}{16}\) = 0.625
\(\alpha\) = cos-1(0.625)
= 51.3o
∠PQR = 2\(\alpha\)
= 2(51.3o)
= 102.6
= 103o
In the diagram, PQR is a triangle.|PQ| = |PR|, |PS| = |SQ| and PRS = 50°. What is the size of ∠PSQ?
75o
80o
85o
95o
Correct answer is B
< PQS = 50° (PQ = PR)
< PQS = < SPQ = 50° (QS = PS)
In triangle PSQ, < PQS + < QPS + < PSQ = 180°
50° + 50° + < PSQ = 180°
< PSQ = 180° - 100° = 80°
Which of the following is not the the size of an exterior angle of a regular polygon?
15o
18o
20o
21o
Correct answer is D
The size of an exterior angle = \(\frac{360}{n}\)
From the options, all options can perfectly divide 360°, except 21°.
How many students are there in the group?
25
30
52
55
Correct answer is C
Total number of students = 20 + 16 + 10 + 6
= 52 students
22.5 years
23.0 years
24.0 years
27.5 years
Correct answer is B
No explanation has been provided for this answer.
WAEC Subjects
Aptitude Tests