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Learning Math Home
Geometry Session 2: Triangles and Quadrilaterals
 
Session 2 Part A Part B Part C Homework
 
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Session 2 Materials:
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Session 2, Part A:
Different Triangles

In This Part: Drawing Triangles | Classifying Triangles

The following shows how triangles can be classified according to some of their features:

Angles:

Right Triangles

Acute Triangles

Obtuse Triangles

Right Angle

Acute Angles

Obtuse Angles

One right (90°) angle

All angles less than 90°

One angle more than 90°

Sides:

Equilateral Triangles

Isosceles Triangles

Scalene Triangles

Equilateral

Isosceles

Scalene

All three sides are the same length.

Two sides are the same length.

All three sides are different lengths.

Size:

Similar Triangles

Congruent Triangles

Similar

Congruent

Same shape, possibly different size

Same size and shape

Problem A5

Solution  

More than one feature can be combined into a triangle. Decide which of the following combinations are possible. If the combination is possible, draw a sketch on a piece of paper. If not, explain why not.

a. 

a scalene right triangle

b. 

an isosceles right triangle

c. 

an equilateral right triangle

d. 

a right triangle that is also obtuse


Next > Part B: Linkage-Strip Constructions

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