What is the name of the shape and what is its perimeter?

The shape has four exterior sides. The top side is $7 \text{ cm}$ and the bottom side is $7 \text{ cm} + 3 \text{ cm} = 10 \text{ cm}$. These two sides are parallel. The left side is vertical ($5 \text{ cm}$), making it perpendicular to the parallel sides. A quadrilateral with exactly one pair of parallel sides is called a trapezium.

The shape is a trapezium.

10. The perimeter of the shape above is \hspace{1.5cm}

The outer boundary consists of four sides:

• Top horizontal side: $7 \text{ cm}$
• Right slanted side: $2 \text{ cm}$
• Bottom horizontal side: $7 \text{ cm} + 3 \text{ cm} = 10 \text{ cm}$
• Left vertical side: $5 \text{ cm}$

$$\text{Perimeter} = 24 \text{ cm}$$

The perimeter of the shape above is $\text{24 cm}$.