Question

ABCD is a trapezium such that AB parallel to CD angle A : angle D = 7:2 angle B: angle C = 4:5 find all angles

Answer 1

Answer:

Step-by-step explanation:

Keep in mind that a trapezium is a quadrilateral, and therefore all of its angles will total 360 degrees.

Now, add up the numbers that you have: 7 + 2 + 4 + 5. That equals 18.

We're going to have to do SOMETHING to that 18 to turn it into a total of 360.

So divide 360 ÷ 18, and you get 20.

So that means you needed to multiply 18 x 20 to get 360.

Which means that you need to take your 4 original numbers above, and multiply each of THEM by 20 before adding them together:

7 x 20 = 140

2 x 20 = 40

4 x 20 = 80

5 x 20 = 100

Add those four products together and they give you 360. So they are your 4 angles! (A, D, B, and C, in that order.)

Hope this helps!

Answer 2

Answer:

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Step-by-step explanation:

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