Hey!
The formula for finding area of a triangle is: (base × height) ÷ 2
The base is 4
The height is 12
12 × 4 = 48
48 ÷ 2 = 24
How do you figure out the answer?
1 answer:
we can divide the composite shape into on quadrilateral and triangle as shown in the diagram. since the line that joins the two shape is parallel to the base AB, the angle DEC is 85°.The angle CEA is 180°- angle DEC = 180-85=95. Angle BCE is sum of angle CEA, ABC and EAB subtracted from360°= 360°-(95+95+85)=85°. Angle DCE is 120°- ECB=35°. So, angle CDE = 180°-(35°+85°)= 60°. For reference see the diagram.
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the fraction of X she used was - 3/8 of X
so we can write the following equation
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therefore length of the original ribbon piece Nicole had was 16 feet