1. The diagram shows a triangle. Which of the
following correctly describes angle x?
b) obtuse
angle;
c) reflex
angle;
d) right-angle.
2. The diagram shows a triangle. What is the value of
x + y + z?
c) 180⁰; d)
135⁰.
3. For each shape, say whether the angles marked are acute, obtuse, right or reflex.
c) acute; d) right.
4. Draw a triangle with an obtuse angle:
а) no; b) ;
c) yes; d) .
c) 60⁰; d) 50⁰.
c) 130⁰; d)
50⁰.
c) i 45⁰; d)
i 40⁰.
c) j 80⁰; d)
j 75⁰.
c) k 35⁰; d)
k 20⁰.
b) h 42⁰, g 67⁰;
c) h 42⁰, g 67⁰;
d) h 42⁰, g 67⁰.
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