Question

Lengths of three sides are given below. Determine which of them will form a triangle . *
7cm, 3.5cm, 3.5cm
3cm, 4cm, 5cm
2cm, 8cm, 4cm
3.4cm, 12cm, 4.3cm​

Answer 1

Answer:

2 is triangle

Step-by-step explanation:

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Answer 2

Answer:

By Pythagoras theorem answer is 3cm,4cm,5cm

we know that the hypotenuse is equal to other two sides of triangles.

1) 7 is the hypotenuse

therefore hypotenuse² = sum of leg ²

7²=3.5²+3.5²

49=12.25+12.25

49=24.50

not equal

2) 5 is the hypotenuse

therefore hypotenuse² =sum of leg²

5² = 4²+3²

25 = 16+9

25=25

it is equal

3)8 is the hypotenuse

therefore hypotenuse² = sum of leg²

8² = 4²+2²

64 = 16+4

64 = 20

not equal

12 is the hypotenuse

therefore hypotenuse² = sum of leg²

12² = 4.3²+3.4²

144 = 18.49+11.56

144 = 30.05

not equal

(hence prove)