It has twelve angles but all of them need not be acute.
a tetrahedron has 3 Right angles
Four.Four.Four.Four.
There are three acute angles in an acute triangle and they add up to 180 degrees.
three
One acute angle
There are 14 angles in a tetrahedron
a tetrahedron has 3 Right angles
A tetrahedron has four vertices.
it has no acute angles
there are three acute angles in an acute triangle, because there are three corners.
It has four vertices.
All the angles in a tetrahedron are 60 degrees.
In an acute triangle, all three angles are acute.
There can be 1 or 2 acute angles.
there are three acute angles in an acute triangle, because there are three corners.
Four.Four.Four.Four.
The letter "N" as two acute angles.