square
An irregular pentagon can have 5 vertices and two right-angles.
yes, shapes with four right angel are like square, rectangle, rhombus and trapezoid.
On a sphere you can draw a triangle with three right angles. . At the North pole , zero meridian and its right angle 90 oW merdian. Draw these meridians to the Equator, and you will find they both meet the Equator at 90 o (degrees).
1.pentogon2.rectangle3.square1.pentogon2.rectangle3.square
wich shaps have right angles
A square shape for example has 4 right angles and a right angle is 90 degrees.
Triangles
The diagonals of a square and a rhombus cross at right angles.
right triangle square rectangle
Acute angles
squares, right triangles, rectangles
square
A-F
quadrilaterals
Square, Rectangle
a rhombus