Math 8 - First Trimester Review

Front

If m∠1 = 30°, what is m∠2 if m∠2 = 180° - m∠1?

Back

m∠2 = 150°

Front

What does it mean for two triangles to be similar?

Back

Two triangles are similar if their corresponding angles are equal and their corresponding sides are in proportion.

Front

If triangle ABC is similar to triangle FGH and the length of side AB is 10 cm while side FG is 5 cm, what is the ratio of similarity?

Back

The ratio of similarity is 2:1.

Front

What is a transformation in geometry?

Back

A transformation is an operation that moves or changes a shape to create a new shape.

Front

Identify the type of transformation: A shape is flipped over a line. What is this called?

Back

Reflection.

Front

What is the result of a 90° clockwise rotation of a point (x, y)?

Back

The new coordinates will be (y, -x).

Front

If you translate a point (3, 2) 3 units to the left and 4 units up, what are the new coordinates?

Back

The new coordinates are (0, 6).

Front

What is the formula for finding the missing side in similar triangles?

Back

The formula is (side1/side2) = (corresponding side1/corresponding side2).

Front

What is the definition of a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

If a triangle has angles measuring 30° and 60°, what is the measure of the third angle?

Back

The third angle measures 90°.