Question

Which measurement is a possible side length for a triangle with two sides measuring 9cm and 4cm?
A) 5cm
B) 6cm
C) 3cm
D)4cm
Can someone explain how exactly to do this?

Answer 1

Use the Pythagorean equation.

Answer 2

A^2 + B^2 = C^2

Answer 3

there is a rule for triangles...the sum of two sides must be greater than the third side

A) 5...suppose i take 5 and 4 as two sides...this must be greater than 9..but it's not..therefore it's not 5

let's look at D) 4

4+4 is not greater than 9 either so that's not it

continue with this logic...do you know the answer?

Answer 4

So it would be 6 ... Because 6+4=10 and 10 is greater than 9

Answer 5

you got it!

Answer 6

6 + 9 is also greater than 4 which further supports your answer

Answer 7

Awesome thanks :)