2D Shapes
What is a 2D shape?
A flat shape
A triangle is a shape with _____ sides
3
What is perimeter?
The length around something.
What is volume?
The area of space an object occupies
What is area?
The area covered by a shape or object.
What is a polygon?
No curves, lines do not cross, closed shape
What does an acute triangle look like?
All three angles are acute
What is the formula for perimeter?
2 x length + 2 x width
or
length + length + width + width
What is the formula for volume?
L x W x H
What is the formula for area?
Length x Width
What is a shape called with 8 sides?
Octagon
True or false: it is possible to draw a triangle that is concave.
false
An isosceles has 2 side lengths of 8 and one length of 4. What is the perimeter?
20
A rectangular prism has a height of 1, length of 2, and width of 3. What is the volume?
6
A carpet is needed for a wooden floor with 15 X 10 measurements. What area of carpet will be needed to cover the floor?
150
What does it mean for a shape to be regular?
The sides and angles are all congruent
What is an isosceles triangle?
Two of the sides will be the same length.
A regular hexagon with side lengths of 4 has what perimeter?
24
What little number is used when practicing volume?
3
What little number is associated with discussing area?
2
Draw a polygon with 6 sides and regular
...
Draw a scalene triangle with a right angle.
...
A square has a length of 14 and width of 11. What is the perimeter?
50
a rectangular prism has a length of 20, height of 15, and width of 10. What is the volume?
3,000
Ms. Fredericks would like a new carpet for her classroom. The dimensions are 16ft x 30 ft. How much carpet will she need to cover the floor?
480 ft2