A triangle has sides the lengths 18, 80, and 82... Is it a right triangle, explain?
A. no, 18 squared+80 squared= 82 squared. (dash through equal sign.)
B. yes, 18 squared+80 squared = 82 squared.
C. no, 18 squared+80 squared= 82 squared.
D. yes 18 squared+ 80 squared= 82 squared.
(dash through equal sign.)

Question

A triangle has sides the lengths 18, 80, and 82... Is it a right triangle, explain?
A. no, 18 squared+80 squared= 82 squared.          (dash through equal sign.)
B. yes, 18 squared+80 squared = 82 squared.
C. no, 18 squared+80 squared= 82 squared.
D. yes 18 squared+ 80 squared= 82 squared.
(dash through equal sign.)

jtvatsim · Answer

You can test whether a triangle is a right triangle by seeing if it meets the Pythagorean Theorem: $$a^2 + b^2 = c^2$$
If it is equal, then it must be a right triangle.
If it is NOT equal, then it is NOT a right triangle.

jtvatsim · Answer

For example, is a triangle with sides 3, 4, and 5 a right triangle? 

Test: $$3^2 + 4^2 = 9 + 16 = 25$$ and $$5^2 = 25$$ so, $$3^2 + 4^2 = 5^2$$
Since they are equal, this is a right triangle! Try it with your numbers now. : )

coexist2 · Answer

thanks for the help everything equals 6724

wolf1728 · Answer

A and D also say "dash through equal sign menaing NOT equal

jtvatsim · Answer

Good job! So, you can say "YES!" They are equal, so this must be a right triangle.

coexist2 · Answer

its B.

jtvatsim · Answer

Yes