Answer:
equilateral
Step-by-step explanation:
answer: equilateral triangle
the triangle that can have 1 right angle is A right isosceles triangle has a 90-degree angle and two 45-degree angles. This is the only right triangle that is an isosceles triangle.
-(-5+12)
opening bracket
-1×-5=5
-1×+12=-12
5+12=17
the answer is the top one and the last one. Hope it helped :)