which one
right
not a triangle
acute
obtuse
2007-01-03 15:35:52 · 7 answers · asked by Chris 1 in Science & Mathematics ➔ Mathematics
you have to rely on the pothagorean equation: a^2+b^2=c^2
if a^2+b^2 is less than c^2 than its obtuse
196+225<289
421<225 false
if a^2+b^2 is greater than c^2 than its acute
196+225>289
421>225 true
SO the triangle is acute
2007-01-03 15:43:25 · answer #1 · answered by TheThing 2 · 0⤊ 0⤋
This is acute.
the reason sides are 14^2+15^2 = 196+225 > 289 or 17^2
2007-01-04 00:16:56 · answer #2 · answered by Mein Hoon Na 7 · 0⤊ 0⤋
a^2+b^2>c^2 is an acute triangle
a^2+b^2
14^2+15^2 ? 17^2
421>289
therefore, this triangle is an acute
2007-01-03 23:43:14 · answer #3 · answered by 7 · 2⤊ 0⤋
Apply the cosine law to solve for each of the 3 angles.
You will find that each angle >90 degress.
GlidingSquirrel
2007-01-03 23:49:33 · answer #4 · answered by GlidingSquirrel 2 · 0⤊ 0⤋
Acute.
2007-01-03 23:37:43 · answer #5 · answered by Anonymous · 2⤊ 0⤋
I'm pretty sure it's acute..
2007-01-03 23:41:41 · answer #6 · answered by teekshi33 4 · 0⤊ 0⤋
acute!
2007-01-03 23:49:51 · answer #7 · answered by arthur!!! 4 · 0⤊ 0⤋