Scale, Area, and Perimeter

Front

What is the formula for calculating the area of a triangle?

Back

Area = 1/2 × base × height

Front

What is the perimeter of a shape?

Back

The perimeter is the total distance around the outside of a shape.

Front

If a square has a side length of 4 cm, what is its perimeter?

Back

Perimeter = 4 × side length = 4 × 4 cm = 16 cm

Front

What does a scale factor of 1:2 mean in a scale drawing?

Back

It means that every 1 unit on the drawing represents 2 units in real life.

Front

How do you find the area of a rectangle?

Back

Area = length × width

Front

If the scale factor is 3, how much larger is the area of the larger shape compared to the smaller shape?

Back

The area is 3² = 9 times larger.

Front

What is the relationship between the scale factor and the perimeter of similar shapes?

Back

The perimeter of similar shapes is proportional to the scale factor.

Front

If a triangle has a base of 6 cm and a height of 4 cm, what is its area?

Back

Area = 1/2 × 6 cm × 4 cm = 12 cm²

Front

What happens to the angles of a shape when it is scaled?

Back

Angles do not change in scale copies.

Front

If the perimeter of a smaller square is 20 cm, what is the perimeter of a larger square with a scale factor of 2?

Back

Perimeter = 2 × 20 cm = 40 cm