Exploring Perimeter and Area of Parallelograms, Triangles, and Trapezoids

What is the first step in finding the perimeter of any shape?

• Attach the correct label

• Calculate the area

• Find the lengths of all the shape's sides

• Add all side lengths together

What is the perimeter of a rectangle with sides 12 cm and 7 cm?

• 24 cm

• 38 cm

• 19 cm

• 14 cm

What is the perimeter of a triangle with sides 9 cm, 12 cm, and 5 cm?

• 30 cm

• 26 cm

• 24 cm

• 21 cm

What is the perimeter of a trapezoid with sides 7 cm, 20 cm, 7 cm, and 10 cm?

• 34 cm

• 64 cm

• 54 cm

• 44 cm

How do you calculate the area of a parallelogram?

• Base times height

• Base times height divided by two

• Base plus height

• Half the base times height

Which formula is used to calculate the area of a trapezoid?

• Sum of bases divided by height

• Base times height

• Half the height times sum of bases

• Height times sum of bases

For calculating area, why is it important that the height is perpendicular to the base?

• To make the shape look bigger

• To accurately calculate the area

• To simplify the calculation

• To ensure the shape is a square

What is the area of a triangle with a base of 12 cm and height of 4 cm?

• 12 cm squared

• 96 cm squared

• 48 cm squared

• 24 cm squared

What is the area of a parallelogram with a base of 12 cm and height of 7 cm?

• 40 cm squared

• 19 cm squared

• 94 cm squared

• 84 cm squared

What does the area calculation of a trapezoid involve?

• Multiplying half the sum of the bases by the height

• Adding the height to the bases

• Adding the bases and then dividing by the height

• Multiplying the sum of the bases by the height