Question

lesson 5: quadrilaterals
quadrilaterals and perimeter formulas
a rectangle has a length 10 cm and a width 5 cm. which of the following is the perimeter?
a. 30 cm
b. 25 cm
c. 50 cm
d. 15 cm
check answer

Explanation:

Step1: Recall perimeter formula

The perimeter formula for a rectangle is $P = 2(l + w)$, where $l$ is length and $w$ is width.

Step2: Substitute values

Given $l = 10$ cm and $w = 5$ cm, then $P=2(10 + 5)$.

Step3: Calculate

First, $10+5 = 15$, then $2\times15=30$ cm.

Answer:

A. 30 cm