Final Chapter 1 Review

Front

What are acute angles?

Back

Acute angles are angles that measure less than 90 degrees.

Front

Identify two acute angles from the following: < GHF, < GHI, < FHJ, < IHF, < JHI, < GHI, < IHG, < IHF.

Back

< JHI and < GHI are acute angles.

Front

What is the result of translating a point 3 units to the left and 9 units down?

Back

To translate a point (x, y), subtract 3 from x and 9 from y.

Front

If point X is at (1, 4), where would X' be after translating 3 units left and 9 units down?

Back

X' would be at (-2, -5).

Front

What is a reflection in geometry?

Back

A reflection is a transformation that flips a figure over a line, creating a mirror image.

Front

What is the transformation from ABC to A'B'C' if it is a reflection across the x-axis?

Back

The y-coordinates of the points are negated.

Front

What happens to the coordinates of a point when it is rotated 180° about the origin?

Back

Both the x and y coordinates are negated.

Front

If point A is at (3, 5), what are the coordinates of A' after a 180° rotation about the origin?

Back

A' would be at (-3, -5).

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

Identify an obtuse angle from the following: < ECD, < BCD, < ACB, < BCE.

Back

< ECD is an obtuse angle.