Question

What is the order of the side lengths of triangle ABC from largest to smallest?

b, a, c

b, c, a

a, b, c

a, c, b

Answer 1

Hint: The side opposite to an angle of higher magnitude is longer.

Answer 2

is it abc?

Answer 3

Yes :)

Answer 4

Which set of numbers does not create a triangle?

80 cm, 25 cm, 1 m

5 m, 12 m, 8 m

110 ft, 12 yd, 150 ft

7 yd, 13 yd, 19 yd

Answer 5

For this, use the fact that the sum of any two sides of a triangle MUST be greater than the third side.

Answer 6

so lets say i add 80+25?

Answer 7

Then you get 105 cm which is greater than 1m (= 100cm). So, this is a triangle.

The trick is to just check whether the sum of the smaller two sides is greater than the third side.

Answer 8

yes but for the first one anf third one i get a bigger number than the third side

Answer 9

You should be getting it to be bigger than the third side. If the sum is smaller, it can never be a triangle.

(By the way, if you check for the third one, 110ft + 12yd < 150ft). It's the third one that cannot be a triangle

Answer 10

so is it the last one or the first one?

Answer 11

It's the third one (110ft + 12yd = 110ft + 36ft = 146ft < 150ft) So the third one cannot be a triangle