Triangles, Quadrilaterals, and Angle Relationships

Front

What is a triangle?

Back

A triangle is a three-sided polygon defined by three vertices and three edges.

Front

What are the types of triangles based on side lengths?

Back

The types of triangles based on side lengths are: Equilateral (all sides equal), Isosceles (two sides equal), and Scalene (no sides equal).

Front

What are the types of triangles based on angles?

Back

The types of triangles based on angles are: Acute (all angles less than 90°), Right (one angle is 90°), and Obtuse (one angle is greater than 90°).

Front

What is a quadrilateral?

Back

A quadrilateral is a four-sided polygon defined by four vertices and four edges.

Front

What are the types of quadrilaterals?

Back

The types of quadrilaterals include: Square, Rectangle, Rhombus, Parallelogram, Trapezoid, and Kite.

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 sum of the interior angles of a quadrilateral?

Back

The sum of the interior angles of a quadrilateral is always 360°.

Front

What are complementary angles?

Back

Complementary angles are two angles whose sum is 90°.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose sum is 180°.

Front

If one angle is 42°, what is its supplement?

Back

The supplement of 42° is 138°.