Answer:
Radius = 5inch
CD = 2.75 cm
Step-by-step 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.
