Geometry Triangles Center

The length of Segment EF is 4 units and the length of Segment ED is 5 units. Find the length of Segment AE.

• 20/3

• 16/3

• 5/3

• 3

What is an isosceles triangle?

• A triangle with all sides different

• A triangle with two congruent sides

• A triangle with all sides congruent

• A triangle with no congruent sides

Determine the center of the dilation.

• Point A

• Point B

• Point C

• Point D

Look carefully at the figure. What is the measure of A'B'C'?

• 40 degrees

• 75 degrees

• 45 degrees

• 70 degrees

What is the value of a?

• 1.25

• 1.5

• 1.875

• 2

Triangle DEF is formed by connecting the midpoints of the sides of triangle ABC. The lengths of the sides of DEF are shown. What is the length of BC?

• 8

• 12

• 15

• 18

• 40 degrees

• 60 degrees

• 65 degrees

• 75 degrees

Triangle DEF is formed by connecting the midpoints of the sides of triangle ABC. What is the perimeter of triangle ABC?

• 12

• 18

• 19

• 38

What is the scale factor from triangle ADE to triangle ACB?

• 2

• 3

• 4/3

• 5/3

Which is the best definition of similarity?

• If two figures have congruent corresponding angles, they are similar.

• If two figures have proportional side lengths, they are similar.

• If there's a sequence of rigid transformations that take one figure to another, they are similar.

• If there's a sequence of rigid transformations and dilations that take one figure to another, they are similar.