A quadrilateral and a triangle
Triangle, square, and pentagon
A scalene triangle, A trapezoid, an irregular pentagon.
a semi circle
There are 3 triangles in a pentagon
A pentagon is a 5 sided polygon.
A quadrilateral and a triangle
There are infinitely many 3-dimensional shapes with a pentagon as its base.
Triangle, square, and pentagon
Pentagonal-Based Pyramid
On level 13 of 40x Escape, there are three shapes: a square, a pentagon inside the square, and a triangle inside the pentagon. The number of sides of each is 4, 5, and 3, going from outside to inside. Click the buttons to make them 4-5-3.
A scalene triangle, A trapezoid, an irregular pentagon.
a semi circle
Depending on the individual shapes, you can make a large triangle, a square or any other quadrilateral, a regular or irregular pentagon or hexagon. If concave shapes are allowed, you can make any polygon upto a decagon.
You can make any triangle, quadrilateral or pentagon with three suitable triangles.
pentagons...
There are 3 triangles in a pentagon