Area
What is the formula for area of a triangle?
1/2b x h OR b x h/2
What do we call a point where two edges meet?
Vertex
How do I find the area of complex shapes?
- Break down the shape into shapes we know how to solve!
- Find areas
- Add areas together
What is surface area?
Total area of all faces on a 3d shape
True or False: A square is always a rectangle.
True
A rectangle has a length of 8 cm and a width of 5 cm. What is its area?
40cm2
What is a flat surface on a 3D shape called?
Face
A figure is a 12×10 rectangle with a 4×3 section removed. What is the area?
120 − 12 = 108 units²
Find the surface area of a cube with side length 4 cm.
6 x 16 = 96 cm 2
Which unit would you use for area: cm or cm²?
cm²
A triangle has a base of 10 m and a height of 6 m. What is its area?
30m2
How many edges does a cube have?
12
A trapezoid has bases of 6 cm and 10 cm and a height of 4 cm.
What is its area?
32cm2
A box has dimensions 5 cm, 3 cm, and 2 cm. What is the surface area?
62 cm2
I speak without a mouth and hear without ears.
I have no body, but I come alive with sound.
What am I?
An echo
A parallelogram has a base of 12.3 inches and a height of 7.9 inches. What is its area?
97.17 in2
What is the difference between area and perimeter?
Area - inside
Perimeter - outside
A kite has a horizontal segment across the middle that measures 10 inches.
The top half of the kite has a height of 6 inches, and the bottom half has a height of 4 inches.
50 in2
Draw a net of a triangular pyramid.
See Mrs. G's answer
You walk into a room with:
How many legs are in the room?
34
Draw a parallelogram on your slide with a slanted side labeled 10.5 cm and a vertical height of 6.4 cm.
Why is the slanted side NOT used to find area? What is the correct area?
Because area uses the height from base to top (perpendicular height).
67.2 cm2
A shape with a square base, and 4 triangular faces would be called what?
Square Pyramid
The total height of a kite is 12 cm. A segment across the middle (its widest part) is 8 cm.
The top triangle has a height of 7 cm.
48cm 2
A rectangular prism (box) has the following dimensions:
What is the total surface area of the prism?
71.92 cm2
What is the only mammal capable of true flight?
A bat