Given: angles ABC is a right angle and angles DEF is a right angle. Prove: All right angles are congruent by showing that angles ABC congruent angles DEF.

What are the missing reasons in the steps of the proof?

A: Def. of right angle, def. of congruent, def. of equal, def. of 90°

B: Identity prop., reflexive prop., subtitution prop., symmetric prop.

C: Def. of congruent angles, def. of equal angles, substitution prop., symmetric prop.

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere

answer: correct

step-by-step explanation:

m∠abd = m∠dbc

step-by-step explanation:

given : ab bisects ∠dbc

as we know that bisection means ab divides   ∠dbc   in two equal angles named as   ∠dba and   ∠abc

so, m∠abd = m∠dbc  

because ab bisects ∠dbc.

hence , the first statement m∠abd = m∠dbc is true.

answer: -x+7

step-by-step explanation: