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Y10F Set 8 assignment 3

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The three inside angles (A, B and C) of a right-angled triangle
are in the ratio 7: 18:11
The smallest angle is 35°
Work out angles A, B and C.
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Answer 1

see below

Explanation:

The smallest angle (35°) must be A because it is the smallest ratio. We can write A, B, and C as 7x, 18x, and 11x and since we know A = 35°, 7x = 35 and x = 5 which means B = 18 * 5 = 90° and C = 11 * 5 = 55°.