They are co-terminal angles.
Yes. If the two acute angles have their measures add up to 90 degrees, and both angles share one side that is common to each angle (they are adjacent), then their non-common sides will be perpendicular.
The non-common sides of two adjacent and complementary angles form a straight angle. Complementary angles are two angles that sum up to 90 degrees, and since they share a common vertex and one side, the other sides point in opposite directions, creating a straight line. Thus, the angle formed by the non-common sides is 180 degrees.
Supplementary angles
If two adjacent angles have their exterior sides in perpendicular lines, then the two angles are complementary. This means that the sum of their measures is 90 degrees. In this scenario, the angles share a common vertex and a side, while their other sides form a right angle with each other.
That would be a right angle: The measure of complementary angles adds up to 90 degrees. Adjacent angles are angles that share one common side and one common vertex, but no common interior points (the angles don't overlap). The non-common sides of two adjacent angles are the two "outside" sides (the unshared sides). Two adjacent and complementary angles would form a right angle split by a ray/line, and not necessarily bisected (perfectly divided in half).
They are co-terminal angles.
Yes. If the two acute angles have their measures add up to 90 degrees, and both angles share one side that is common to each angle (they are adjacent), then their non-common sides will be perpendicular.
Supplementary angles
The non-common sides of two adjacent and complementary angles form a straight angle. Complementary angles are two angles that sum up to 90 degrees, and since they share a common vertex and one side, the other sides point in opposite directions, creating a straight line. Thus, the angle formed by the non-common sides is 180 degrees.
If two adjacent angles have their exterior sides in perpendicular lines, then the two angles are complementary. This means that the sum of their measures is 90 degrees. In this scenario, the angles share a common vertex and a side, while their other sides form a right angle with each other.
All angles have two sides!
Those angles are called Alternate Exterior Angles. When two lines are crossed by another line (which is called the Transversal), the pairs of angles on opposite sides of the transversal but outside the two lines are called Alternate Exterior Angles.
The term that describes a pair of angles formed by the intersection of two straight lines that share a common vertex but do not share any common sides is "vertical angles." Vertical angles are always equal in measurement and are located opposite each other at the intersection point of the two lines.
An isosceles triangle has two sides and two angles that are the same.
A rectangle has two right angles and parcel sides
The shapes that have 3 sides and 3 vertices are called triangles. Triangles are classified based on the lengths of their sides and the measures of their angles. The three most common types of triangles are equilateral triangles (all sides and angles are equal), isosceles triangles (two sides and two angles are equal), and scalene triangles (all sides and angles are different).