Classifying Triangles
Classify the triangle by its sides.
I am a triangle with 3 equal sides.
Equilateral Triangle
What should the interior (inside) angles of a triangle add up to?
180 degrees
What formula do you use to find the area of a triangle?
A=1/2bh OR A= bh/2
Which quadrilateral has exactly one pair of parallel sides? A. rectangle B. rhombus C. parallelogram D. trapezoid
D. trapezoid
If the radius is 5 m, what is the diameter?
10 m
Classify the triangle by its sides.
I am a triangle with 2 equal sides.
Isosceles Triangle
Find the missing angle measure.
Angle 1= 60 degrees
Angle 2= ?
Angle 3= 60 degrees
60 degrees
Find the area of the triangle with the following measures.
base= 5cm
height= 10cm
A= 25cm2
Which quadrilateral has 4 right angles, all sides congruent, opposite sides parallel, and perpendicular bisectors? A. rectangle B. rhombus C. square D. parallelogram
C. square
If the diameter is 20 cm, what is the radius?
10 cm
Classify the triangle by its angles.
angle 1= 25 degrees
angle 2= 127 degrees
angle 3= 28 degrees
Obtuse Triangle
Find the missing angle measure.
Angle 1= ?
Angle 2= 72 degrees
Angle 3= 90 degrees
18 degrees
Find the area of the triangle with the following measures.
base= 108 m
height= 45 m
A=2430 m2
Which quadrilateral has 4 congruent sides, opposite sides parallel, and perpendicular bisectors? A. square B. rectangle C. rhombus D. parallelogram
A. Square C. rhombus
If the radius is 30 m, what is the diameter?
60 m
Classify the triangle by its sides and angles.
I am a triangle with 2 equal sides and the following angle measures:
angle 1= 49 degrees
angle 2= 82 degrees
angle 3= 49 degrees
Acute Isosceles Triangle
Find the missing angle measure.
Angle 1= 41 degrees
Angle 2= 29 degrees
Angle 3= ?
110 degrees
Find the area of the triangle with the following measures.
base= 14.5 in
height= 39.3 in
A= 284.925 in2
Which two quadrilaterals have four congruent sides? A. rhombus and rectangle B. rhombus and parallelogram C. rectangle and square D. rhombus and square
D. rhombus and square
If the radius is 20.52 cm, what is the diameter?
41.04 cm
Classify the triangle by its sides and angles.
I am a triangle with no equal sides and the following angle measures:
angle 1= 64 degrees
angle 2= 99 degrees
angle 3= 17 degrees
Obtuse Scalene Triangle
Is it possible for a triangle to have the angle measures of 65 degrees, 77 degrees, and 37 degrees? Why or why not?
No, because a triangle's measure's must add up to 180 degrees and 65 + 77 + 37 = 179.
Fred has a triangle shaped garden that has a base of 27 feet in his backyard. The height of his garden is 14 feet. The perimeter of his garden has 96 feet of fencing around it. What is the area of Fred's garden?
A= 189 ft2
Which property is common to all quadrilaterals? A. four angles B. four congruent sides C. opposite sides parallel D. opposite angles congruent
A. four angles
Draw a Circle and its part.
It must contain centre, circumference, radius and diameter.