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sertanlavr [38]
2 years ago
6

Michael is making a card for his dad's birthday. He's shaded a triangular section on the card where he wants to write his dad a

message. What is the area of the parts of the card that are not shaded?(sides are 12cm, 3,, 9 )
144
108
72
66
Mathematics
2 answers:
artcher [175]2 years ago
7 0

Answer:

Option C (72)

Step-by-step explanation:

In the figure attached we can see a rectangle ABCD with length 12 cm and width 9 cm.

A  triangle PEF with height BE and base EF.

Since side AE = 3 cm, so side EB = EC = 9 - 3 = 6cm

and EF = AD = 12 cm

Now we will find the area of of the parts of the card that are not shaded.

Area of parts that are not shaded = Area of rectangle - area of shaded triangle

= (12×9) -

= 108 -

Option c) 72 cm² is the area of non shaded part.

Hope this helps!! -Mina

Aneli [31]2 years ago
5 0
C. 72

Hope this helps.
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