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1 Answer

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Answer:

Radius = 5inch

CD = 2.75 cm

Explanation:

A) isosceles triangles AC = AD BC = BD BC = AC you join lines up and then do Pythagoras. AC ² = 1/2 * 8 ² + 1/2 6²

AC² = 4sq + 3sq

25sq = 16sq + 9sq

AC² = 25sq = 5inch

Radius = 5inch

B) AB = 8inch CD = 6inch radius = 5 ratio = 4 : 3 : 2.5

AB = 24cm CD = 18 radius = 13cm ratio = 4 : 3 : 2.1

4- 2.1 = 1.9 1.9 distributed = 1.30 + 0.65 + 1 =2.75

so ratio must be 4: 2.75 : 2.1 = 4 : 3 : 2.5

Therefore CD = 2.75 cm

Just to get you started.

User Mozman
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