A sphere has a diameter of 8 cm. Which statements about the sphere are true? Select two choices. Recall the formula S A = 4 pi r squared.
The sphere has a radius of 4 cm.
The sphere has a radius of 16 cm.
The surface area of the sphere is 32 pi centimeters squared.
The surface area of the sphere is 64 pi centimeters squared.
The surface area of the sphere is 256 pi centimeters squared.

step-by-step explanation:

answer:   the paragraph proof is mentioned below.

step-by-step explanation:

given: in a δxwy where

such that, ∠wzx ≅ ∠yzx and zw≅zy

we have to prove that: segment zx is a perpendicular bisector of segment wy.

prove: since, zw≅zy ⇒ ∠wzy is a supplementary angle.

then, ∠wzy= 180°

⇒∠wzx + ∠yzx = 180° ( because xz divides ∠wzy into two parts)

but, ∠wzx ≅ ∠yzx ( given)

⇒∠wzy+∠wzy=180° ( by substitution)

⇒2∠wzy=180°

⇒∠wzy=90°

⇒∠wzy=∠yzx =90°

therefore, xz⊥wy where wz=zy

⇒zx is a perpendicular bisector of wy.

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step-by-step explanation:

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