SY25 Geometry IA2 (Final) Review A

Front

What is the effect of dilating a point (x, y) by a scale factor of k?

Back

The new coordinates of the point after dilation are (kx, ky).

Front

What is the standard equation of a circle with center (h, k) and radius r?

Back

Front

If two triangles are similar, what can be said about their corresponding angles?

Back

The corresponding angles of similar triangles are equal.

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a triangle is always 180°.

Front

How do you find the measure of an unknown angle in a triangle if you know the measures of the other two angles?

Back

Subtract the sum of the known angles from 180°.

Front

What is the relationship between the sides of similar triangles?

Back

The ratios of the lengths of corresponding sides of similar triangles are equal.

Front

What is the formula to calculate the radius of a circle given its equation in standard form?

Back

Front

What is the scale factor in a dilation?

Back

The scale factor is the ratio of the distance from the center of dilation to a point and the distance from the center of dilation to its image.

Front

How do you determine the coordinates of a dilated point A' from point A (x, y) using a scale factor of k?

Back

Multiply the coordinates of point A by the scale factor k: A' = (kx, ky).

Front

What is the equation of a circle with center at the origin and radius r?

Back