Answer:
B. False; to be concave the angles cannot be congruent.
Step-by-step explanation:
Regular Polygons are never concave.
You could use flash lights, or lots of candles. Candles in the dark is truly beautiful.
Use the Pythagorean Theorem (which is only true for right triangles)
a^2 + b^2 = c^2
where
a = 25
b = 312
and c = 313
25^2 + 312^2 = 313^2
625 + 973244 = 97969
97969 = 97969
this is a true statement
therefore your ramp Is indeed a Right Triangle