please help me becuase I don't get it
Answers
Hope this helps you. Pls mark it Brainliest!!!! :D
Step-by-step explanation:
1) Area of rectangle
The diagram shows that the rectangle is 6 in long and 3 in wide.
Area of rectangle = length × width
= 6 in × 3 in
= 18 in² ( read it "18 square inches" )
2) Area of triangle
Look at the triangle sideways so that the line on the right is its "base".
The diagram shows that the base is 1 in.
The dashed line is then the height of the triangle. The diagram shows that this is also 1 in.
Area of triangle = 1/2 × base × height
= 1/2 × 1 in × 1 in
= 1/2 in² ( read it "half a square inch" )
= 0.5 in² ( if you prefer decimals, 1/2 is 0.5 )
3) Square inches of plastic in ruler
"Square inches" is asking for the area, since that is measured in square inches here.
Area of plastic
= area of rectangle - area of triangular hole
= 18 in² - 0.5 in²
= 17.5 in²