1966
Home is great!
As the home plate has 5 angles it is a pentagon. The angles of a pentagon sum to (5 - 2) × 180° = 3 × 180° = 540° Three angles are right angles, and their sum is 3 × 90° = 270° This leaves 540° - 270° = 270° As the remaining two angles are congruent, they are each half of this at 270° ÷ 2 = 135° The remaining angles are 135° each.
If it has four 90 degree angles, than it's a square, and therfore only has four angles.
Los Angles
There are three 90 degree angles. (Looking at home plate from a "pitcher's viewpoint), the wide "front" of home plate has 90 degree angles on both sides. The back point, e.g. "the heart of the plate," is a 90 degree angle. The two angles closest to the batter's back foot are both 135 degrees. This is because these angles are the sum of a 90 degree angle and a 45 degree angle. The back "triangle" of home plate is a 45-45-90 triangle.
A 6 sided hexagon has 6 exterior angles that add up to 360 degrees and 6 interior angles that add up to 720 degrees
There are three 90 degree angles. (Looking at home plate from a "pitcher's viewpoint), the wide "front" of home plate has 90 degree angles on both sides. The back point, e.g. "the heart of the plate," is also a 90 degree angle. The two angles closest to the batter's back foot are both 135 degrees. This is because these angles are the sum of a 90 degree angle and a 45 degree angle. The back "triangle" of home plate is a 45-45-90 triangle. Hope this helps.
Garret Anderson
One example is hinges on a door that is wide open.
Home plate or the ends of a properly built house.
Angles angles angles