Solve for each of the following proportions: a. 5/x=30/42 b. x/8=-12/32
1 answer:
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The radius of a circle is always half of the diameter of the circle. In this case, the diameter is 
, meaning that when we halve , we will get our radius. Therefore, the radius of the circle is 
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Answer:
see explanation
Step-by-step explanation:
(a)
The angle around the centre O of the circle = 360°, then
∠ AOB = 360° - 260° = 100°
Δ AOB is isosceles ( the radii OA and OB are congruent )
The altitude from O bisects ∠ AOB , thus
y = 50°
Since the triangle is isosceles the 2 base angles are congruent, so
x = =
= 40°
(b)
∠ POR = 360° - 254° = 106°
Δ POR is isosceles (the radii OP and OR are congruent ) , then
the 2 base angles are congruent , thus
a = =
= 37°