Page 249 - ABCTE Study Guide_Neat

• The Pythagorean Theorem relates the lengths of the sides of a right triangle. It
states , where a and b are the lengths of the legs and c is the length of the
hypotenuse.
• Trig functions relate the measure of an angle to the sides of a triangle.
• There are three basic trig functions:

Measuring Quadrilaterals

Lesson Objective

In the upcoming section, we’ll review a variety of formulas to measure the perimeter and area of quadrilaterals.

Previously Covered

A quadrilateral is a four-sided polygon.

A parallelogram is a quadrilateral whose opposite sides are parallel.

A rectangle is a parallelogram with four right angles.

A rhombus is a parallelogram whose sides are all congruent.

A square is both a rhombus and a rectangle.

A trapezoid is a quadrilateral with exactly one pair of parallel sides.

Quadrilaterals: Perimeter

Recall that the perimeter of a polygon is the sum of the lengths of its sides. Questions involving the
perimeter of a parallelogram may rely on your knowledge of the properties of that parallelogram. Let’s look
at some examples.

Question

Which of the following gives the perimeter of a rhombus with side length s?

A P =

B P =