Perpendicular lines make four 90 degree angles otherwise known as right angles.
an arrowhead has 4 angles. but no, you can't make an arrowhead out of only right angles.
Supplementary angles.
two supplementary angles * * * * * NO! Supplementary angles sum to 180 degrees = 2 right angles. The correct answer is complementary angles.
There can be 0 to 5 right angles, or 1 to 6 obtuse angles in a hexagon.
All of them. If its truly intersecting lines, they have to form right angles. All of them. If its truly intersecting lines, they have to form right angles.
The simplest shape that can have 2 right angles is a rectangle or a square. You can make an unlimited number of more complex shapes, though. A house shape is a pentagon with 2 right angles--you could even make it with 3 right angles.
Do you mean an octagon with ONLY 4 right angles? If you just need at least 4 right angles than you just need to make a block lettered capital "T"
No you cannot make a triangle with two right angles. In all triangles the sum of the angles is always 180°. Also all triangles have three angles. If there are two right angles, you already have 180° and cannot have another angle to complete the triangle.
The compliment.
180
no