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andre [41]
3 years ago
12

Which equation exemplifies the commutative property of multiplication??

Mathematics
1 answer:
Iteru [2.4K]3 years ago
3 0
The answer is 1.

EXPLANATION

The commutative property of multiplication states that two numbers can be multiplied in either order.
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erastova [34]

Answer:

Step-by-step explanation:

1) ABCD is a trapezium. AB ║ CD

∠ADC + ∠DAB  = 180°  { Co interior angles}

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2) Sum of all angles of trapezium = 360°

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                 230 + ∠DCB = 360

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∠DCB = 130°

3) For finding the height, use Pythagorean theorem

height² + base² = hypotenuse²

      height² + 6² = 10²

      height² + 36 =100

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               height = √64

height = 8 m

4) a = AB = x m

  b = 9 m

h = height = 8 m

Area of trapezium = 120 m²

\frac{(a+b)*h}{2}\\\\  = 120

\frac{(x+9)*8}{2} =120\\\\\\(x +9)*4 = 120

x + 9 = 120/4

x + 9 = 30

    x = 30 - 9

x = 21 m

AB = 21m

                             

7 0
3 years ago
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