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Gwar [14]
2 years ago
5

Work out the unknown angles. Give reasons for each answer.

Mathematics
1 answer:
zalisa [80]2 years ago
8 0
A)

Because the sum of angles in a triangle must equal 180° we can say:

62+α+90=180

α+152=180

α=28°

b)

Since all sides have equal length, all angles must have equal measure.  (This is an equilateral triangle).  And again, because the sum of the angle must be 180° we can say:

b+b+b=180

3b=180

b=60°
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