Question

MEDAL TO CORRECT ANSWER

Answer 1

You know CD and AD and your triangle is split into 2 right angle triangles, use pythagoras theoram to work out the missing side on the first triangle, then look at the other right angle triangle and do the same to work out AB

Answer 2

Honestly the picture looks invalid to what it's asking. Because that looks like an angle bisector and an isosceles triangle.

Answer 3

9.75974032312
9.8
I got it by using similarity. find the ratio of BC and CD, and divide/mutiply it with AD to get BA depending upon the kind of ratio you used.

Answer 4

I get 15.5

Answer 5

Use pythagoras

Answer 6

9.8 would seem to be the only logical answer also. Because just try fitting the other numbers in there, the substitutions don't make sense

Answer 7

true

Answer 8

But technically pythagoras should give the same length?

Answer 9

Like if I was just looking at it, 9.8 would be best answer. But Mathbreakers logic makes the right answer also.

Answer 10

The triangle was never claimed to be isosceles or equal sides so.

Answer 11

You cannot use pythagoras it does not specify it is a right angled triangle. It only shares a side, doesnt make it right angled :)

Answer 12

llol my bad

Answer 13

always assuming it is right angled hwen I see a line through the middle oops

Answer 14

Hehe i do it everytime ;)

Answer 15

I'm taking the proof geometry so I was just looking at it in a nonmathway.