3 acute angles
Acute triangle;e
1 obtuse angle
Obtuse angle
1 right angle
Right triangle
2 equal sides
Isosceles triangle
All 3 equal sides
Equilateral triangle
All sides different
Scalene Triangle
1 pair of parallel sides
Trapezoid
2 pairs of parallel sides, OPPOSITE SIDES CONGRUENT< AND OPPOSITE ANGLES CONGRUENT
Parallelogram
2 pairs of parallel sides, OPPOSITE SIDES CONGRUENT< ALL ANGLES OVER 90 DEGREES
Rectangle
2 pairs of parallel sides, ALL SIDES CONGRUENT< OPPOSITE ANGLES CONGRUENT
Rhombus
2 pairs of parallel sides, ALL SIDES CONGRUENT< AND ALL ANGLES ARE 90 DEGREES
Square
WHat Are triangles based on
Sides and Angles
2 of the main Quadrilaterals
Trapezoid and parallelograms