Triangle and Quadrilateral Review

Acute Triangle An acute triangle has three acute angles.

Right Triangle A right triangle has one right angle.

Obtuse Triangle An obtuse triangle has one obtuse angle.

Equilateral Triangle An equilateral triangle has three sides of the same length.

Isosceles Triangle An isosceles triangle has at least two sides of the same length.

Scalene Triangle A scalene triangle has no sides the same length.

Classify Triangles Using Sides Scalene Triangle This triangle has NO congruent sides

Isosceles Triangle This triangle has 2 congruent sides. This symbol represents that the sides are congruent

Classify Triangles Using Sides Equilateral Triangle This triangle has 3 congruent sides

Name the Triangle by the Angle Acute

Right

Acute

Name the triangle by the Angle Right

obtuse

Classify triangles by sides and angles a) b) c) ° 40° 120°45° 15° a)Scalene, Right b)Isosceles, Acute c)Scalene, Obtuse

Classify triangles by sides and angles a) b) c) ° a)Acute Equilateral b)Right scalene c)Obtuse Isosceles

Quadrilaterals

Name This Quadrilateral Square

Name This Quadrilateral Trapezoid

Name: Number of Sides: Types of Angles: Types of Sides: Tell Me About This Quadrilateral Rectangle 4 Right Parallel and Perpendicular

Name: Number of Sides: Types of Angles: Types of Sides: Tell Me About This Quadrilateral Parallelogram 4 2 Acute, 2 Obtuse Parallel