In quadrilateral ABCD, the diagonals intersect at point T. Thomas has used the Alternate Interior Angles Theorem to show that angle ADB is congruent to angle DBC and that angle DBA is congruent to angle BDC. Which of the following can Thomas use to prove that side AB is equal to side DC?

A. AC ≅ AC

B. AC ≅ DB

C. TA ≅ TC

D. DB ≅ DB

The side DB is common to both the Triangles BAD and DCB, so it can be used to prove that the two triangles are congruent and hence the sides AB and DC are equal ( as corresponding sides of congruent triangles )

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5