Which of these measures below could be sides of a right triangle?
a 2cm, 3cm, 4cm
b 3 ch, 4cm, 5 cm
c 5cm, 6cm, 7cm
d 7cm, 8cm, 10cm
2007-01-15 02:55:45 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
You have to check which of them fit the Pythagorean Theorem:
a² + b² = c²
(where a and b don't matter, but c must be the biggest).
b is the only one that works:
3² + 4² = 5²
9 + 16 = 25
25 = 25
The (3, 4, 5) Pythagorean Triple is REALLY common, as I'm sure you'll see as you keep learning math.
2007-01-15 03:01:00 · answer #1 · answered by Jim Burnell 6 · 2⤊ 0⤋
B the hypothenuse as 5 cm
the other sides 4 and 3
Theorema of pythagorus :
4^2 +3^2 = 5^2 since 16+9 =25
2007-01-15 11:08:13 · answer #2 · answered by maussy 7 · 0⤊ 0⤋
b is a right angled triangle
9 + 16 = 25 and 25 = 5 squared
Now you try the same thing with 5, 12 and 13
2007-01-15 11:02:12 · answer #3 · answered by rosie recipe 7 · 0⤊ 0⤋
Use the Pythagorean Theorem:
a² + b² = c²
a. No
b. Yes
c. No
d. No
Now, use the formula to prove it to yourself.
2007-01-15 10:59:50 · answer #4 · answered by Dave 6 · 1⤊ 0⤋
b
5^2=3^2+4^2
2007-01-15 11:03:56 · answer #5 · answered by CubicleWizard 2 · 0⤊ 0⤋
b. 3cm,4cm,5 cm
2007-01-15 11:15:29 · answer #6 · answered by raj 7 · 0⤊ 0⤋
a2 + b2 = c2
so the answer is b
2007-01-15 12:12:48 · answer #7 · answered by gotriceazn101 2 · 0⤊ 0⤋
b is correct. But you should calculate it.
a2 + b2 = c2
2007-01-15 11:11:48 · answer #8 · answered by JiveSly 4 · 0⤊ 0⤋
b
2007-01-15 11:04:53 · answer #9 · answered by Oo T 3 · 0⤊ 0⤋
b
2007-01-15 11:03:06 · answer #10 · answered by aficionado210 2 · 0⤊ 0⤋