8) Perimeter, Area And Volume Flashcards
What is the perimeter of a 2D shape?
Total distance all around the outside.
What is the expression for the perimeter of a rectangle?
2l + 2w.
What is the area of a 2D shape?
The amount of space inside a shape.
What is area measured in?
Measurement**2.
What is the expression for the area of a rectangle?
L*W.
What is the expression for the area of a parallelogram?
1/2 * base * perpendicular height.
What is the expression for the area of a triangle?
1/2 * base * perpendicular height.
What is the expression for the area of a trapezium?
1/2 * (a+b) * h.
What do you need to do to find the area of a compound shape?
Split shape into simple shapes find area of each shape individually then add the areas together.
What do you do to find the area of a shape with another shape cut out?
Find area of each shape separately. Subtract to find the area that is left.
How do you find the surface area of a 3D solid?
Work out area of each face. Then add the areas together.
How do you find the volume of a 3D solid?
Amount of space it takes up. Volume is measured in measurement**3.
What is the expression for the volume of a cuboid?
Length * width * height.
What is a prism?
A 3D object whose cross-section is the same all through its length.
What is the capacity of a 3D object?
Amount of liquid it can hold.
