Question

lesson 5: quadrilaterals
quadrilaterals and perimeter formulas
which of the following is the perimeter of a rhombus with one side equal to 7 mm?
a. 56 mm
b. 28 mm
c. 49 mm
d. 14 mm
check answer

Explanation:

Step1: Recall rhombus property

A rhombus has 4 equal - length sides.

Step2: Use perimeter formula

The perimeter $P$ of a polygon is the sum of the lengths of its sides. For a rhombus with side length $s$, $P = 4s$.
Given $s = 7$ mm, then $P=4\times7 = 28$ mm.

Answer:

B. 28 mm