Question

which steps can be used to calculate the perimeter of shapes? a. add up the lengths of all the sides. b. multiply the number of sides by the area c. figure out the unknown angle of the triangle d. divide the area by the number of sides

Explanation:

Step1: Recall the definition of perimeter

Perimeter is the total length around a shape.

Step2: Analyze each option

• Option a: Adding up the lengths of all sides gives the total length around the shape (perimeter).
• Option b: Multiplying number of sides by area has no relation to perimeter.
• Option c: Finding an unknown angle of a triangle is about angles, not perimeter.
• Option d: Dividing area by number of sides is not related to perimeter.

Answer:

A. Add up the lengths of all the sides.