Vocabulary
What does “area” measure?
The number of square units inside a shape
Formula for the area of a triangle.
A=BxH/2
What is a composite figure?
A shape made up of two or more simple shapes
What are the two lines that make up the coordinate plane?
The x-axis and y-axis.
A cube with side length 3 units has how many faces?
6 faces.
What does “volume” measure?
The amount of space inside a 3D figure.
Formula for the area of a parallelogram.
A = B x H
A rectangle (10 × 4) is attached to a triangle (base 10, height 3). Find total area.
40 + 15 = 55 units².
Plot (3, 2). Which quadrant is it in?
Quadrant I.
What is the volume formula for a rectangular prism?
V = Length x Width x Height
What does “surface area” mean?
The total area of all the faces of a 3D figure.
A triangle has base 8 cm and height 5 cm. What is its area?
20 cm²
To find the area of a figure with a missing part (like a rectangle with a hole), what do you do?
Subtract the area of the missing part from the larger shape.
What are the coordinates of the origin?
(0, 0).
Find the volume of a prism: length 5, width 3, height 4.
60 units³.
What are “corresponding parts” in similar figures?
Matching sides or angles in two figures that have the same relative position.
A parallelogram has base 12 m and height 7 m. What is its area?
84 m².
A figure is made of two rectangles: 6 × 4 and 5 × 3. What is the area?
24 + 15 = 39 units²
If a rectangle has points (0,0), (0,4), (5,0), and (5,4), what is its area?
20 units².
A rectangular prism has dimensions 2 × 3 × 4. Find its surface area.
52 units².
What is a “net” of a 3D figure?
A 2D layout that can be folded into a 3D shape.
If a triangle is decomposed into two smaller right triangles, how does the sum of their areas relate to the original?
The sum of the areas equals the area of the original triangle.
A composite figure is made of a parallelogram (base 8, height 6) and a triangle (base 8, height 4). Find the area.
(8×6) + (½×8×4) = 48 + 16 = 64 units².
A triangle has vertices at (0,0), (0,3), (4,0). Find the area.
6 units².
A cube has side length 6 cm. Find its surface area.
6 times (6×6) = 216 cm².