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Triangle with one angle over ninety degrees?
An obtuse triangle.
What type of triangle is ABC?
You must have more information about the triangle. If you know the angles, and two of them are equal, it is an isosceles triangle. If all three of the angles are sixty-degrees, it is an equilateral triangle. If none of the angles are the same, it is a scalene triangle. If one of the angles is ninety degrees, it is a right triangle (right triangles may also be scalene or isosceles). If you know the side lengths and two of them are equal, it is isosceles. If they are all equal, it is equilateral. If none of them are equal, it is scalene. A scalene or isosceles triangle may also be a right triangle, which you could determine from side lengths using the pythagorean theorem.
What type of triangle has an angle that measures 20 degrees and an angle that measures ninety degrees?
It is a right angle triangle and its 3rd angle is 70 degrees.
How many square feet is 30x30?
Thirty feet by thirty feet is ninety square feet (just multiply length by width).
If an isosceles triangle has on side that's sixty degrees what are the other sides?
You cannot have an isosceles trinangle with 60 degrees sides
