Corrections Test 4

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length. The angles opposite these sides are also equal.

Front

In an isosceles triangle, if the vertex angle is at F, what are the base angles?

Back

The base angles are ∠I and ∠R, which are equal.

Front

What is the base of an isosceles triangle with vertex angle at F?

Back

The base is the side opposite the vertex angle, which is the segment connecting the other two vertices, in this case, segment RI.

Front

What is a translation in geometry?

Back

A translation is a transformation that slides a figure in a straight line from one position to another without changing its shape, size, or orientation.

Front

If two angles of a triangle each measure 60°, what can be said about the triangle?

Back

The triangle is always equilateral, as all three angles must sum to 180° and the third angle must also be 60°.

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

What is the definition of a vertex in a triangle?

Back

A vertex is a point where two sides of a triangle meet.

Front

What is the formula to find the measure of an exterior angle of a triangle?

Back

The measure of an exterior angle is equal to the sum of the measures of the two non-adjacent interior angles.

Front

What is the relationship between the angles in a triangle?

Back

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

Front

What is a reflection in geometry?

Back

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