Asked by kira
Which could be the sides of a right triangle?
a
2.5 cm, 6.5 cm, 6 cm
b
2 cm, 2 cm, 5 cm
c
1.5 cm, 2.5 cm, 4 cm
d
2 cm, 3 cm, 5 cm
a
2.5 cm, 6.5 cm, 6 cm
b
2 cm, 2 cm, 5 cm
c
1.5 cm, 2.5 cm, 4 cm
d
2 cm, 3 cm, 5 cm
Answers
Answered by
mathhelper
If it is right-angled, then the largest side would be the hypotenuse, so just check
Pythagoras for each given case, I will do c
is 4^2 = 1.5^2 + 2.5^2 ?
is 16 = 1.25 + 6.25
is 16 = 8.5 ??
I guess not.
do the others in the same way
Pythagoras for each given case, I will do c
is 4^2 = 1.5^2 + 2.5^2 ?
is 16 = 1.25 + 6.25
is 16 = 8.5 ??
I guess not.
do the others in the same way
Answered by
oobleck
or, by learning a few of the basic right triangles, such as
3-4-5
5-12-13
8-15-17
17-24-25
you can save yourself some work. For example, choice A is just a 5-12-13 scaled down by 1/2
3-4-5
5-12-13
8-15-17
17-24-25
you can save yourself some work. For example, choice A is just a 5-12-13 scaled down by 1/2
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