Suppose that m∠a = m∠d. which other fact would guarantee that the triangles are similar? a) ab __ de = cb __ fe b) m∠c = m∠f c) m∠a + m∠b + m∠c = 180° d) 180° - m∠d = m∠e + m∠f

B)m∠C = m∠F

Step-by-step explanation:

Given: In triangles ΔABC and Δ DEF

m∠A = m∠D

To prove both the triangles are similar, we need at-least one one information which is given in option B.

If m∠C = m∠F, then AA similarity criteria , ΔABC and Δ DEF  are similar.

If we choose A) then it will not follow SAS criteria of similarity because ∠A and ∠D are not included angles of AB, CB and DE, FE respectively.

SAS similarity criteria for similar triangles says that if two sides of a triangle are proportional to two sides of another triangle and their included angles are equal, then the triangles are said to be similar.

if x decreases by 4 then y increases by 10

step-by-step explanation: