1. Find the angles marked with the
letters.
b) u 40⁰, v 80⁰, w 60⁰;
c) u 30⁰, v 80⁰, w 70⁰;
d) u 20⁰, v 80⁰, w 80⁰.
2. Find the angles marked with the letters.
b) x 45⁰, y 65⁰, z 75⁰;
c) x 40⁰, y 60⁰, z 75⁰;
d) x 40⁰, y 65⁰, z 70⁰.
3. Find the angles marked with the letters.
b) a 80⁰, b 60⁰, c 35⁰;
c) a 85⁰, b 65⁰, c 35⁰;
d) a 85⁰, b 60⁰, c 35⁰.
4. Find the angles marked with the letters.
b) d 100⁰, e 100⁰, f 38⁰, g 142⁰;
c) d 100⁰, e 90⁰, f 38⁰, g 142⁰;
d) d 100⁰, e 100⁰, f 36⁰, g 144⁰.
5. Find the angles marked with the letters (Exam Question often want reasons. Ask your teacher if you must write down all the reasons)
c) a 70⁰; d)
a 75⁰.
6. Find the angles marked with the letters (Exam Question often want reasons. Ask your teacher if you must write down all the reasons)
b) c 68⁰, b 78⁰;
c) c 66⁰, b 74⁰;
d) c 68⁰, b 74⁰.
7. Find the angles marked with the letters (Exam Question often want reasons. Ask your teacher if you must write down all the reasons)
а) d 74⁰, e 24⁰;
b) d 76⁰, e 24⁰;
c) d 74⁰, e 22⁰;
d) d 75⁰, e 25⁰.
b) e
51⁰, f 83⁰, g
95⁰;
c) e
51⁰, f 85⁰, g
95⁰;
d) e
52⁰, f
85⁰, g 95⁰.
b) u 75⁰, t 75⁰, s 65⁰;
c) u 75⁰, t 75⁰, s 55⁰;
d) u 70⁰, t 70⁰, s 65⁰.
b) c 43⁰, d 43⁰;
c) c 39⁰, d 39⁰;
d) c 41⁰, d 40⁰.
11. The angles x, y and z in a triangle are in the ratio 5:1:3.
Find the sizes of angles x, y and z.
а) x 110⁰, y 20⁰, z 50⁰;
b) x 100⁰, y 10⁰, z 70⁰;
c) x 100⁰, y 20⁰, z 60⁰;
d) x 90⁰, y 30⁰, z 60⁰.
b) x 11⁰, y 52⁰, z 42⁰;
c) x 10⁰, y 53⁰, z 42⁰;
d) x 11⁰, y 53⁰, z 42⁰.
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