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5th Grade MATH
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Worksheet 103 - Geometry - Triangles
Q1. A triangle is a polygon with,
A. Four corners or vertices and four sides or edges which are line segments.
B. Three corners or vertices and three sides or edges which are line segments.
C. Five corners or vertices and five sides or edges which are line segments.
D. Five corners or vertices and five sides or edges which are line segments.
Please explain:
Q2. A triangle is a polygon that has,
0
A. 3 angles that are all exactly 90
B. 3 angles
0
C. 4 angles that are all exactly 90
D. 4 angles
Please explain:
Q3. The sum of the degree measures of all the angles in a triangle is,
A. 180 degrees
B. 360 degrees
C. 270 degrees
D. 280 degrees
Please explain:
Q4. An equilateral triangle has,
A. All three sides that are the same length
B. All three angles that measure the same
C. Two sides that are the same length
D. Both A and B
Please explain:
Q5. An isosceles triangle has,
A. All three sides that are the same length
B. All three angles that measure the same
C. Two sides that are the same length
D. Both A and B
Please explain:
Q6. A scalene triangle has,
A. All three sides that are different in length
B. All three angles that measure the same
C. Two sides that are the same length
D. Both A and B
Please explain:
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5th Grade MATH
Q7. A “right” triangle has,
o
A. Two angles that are 90
o
B. One angle that is 90
C. All three angles that measure the same
o
D. One angle that is greater than 90
Please explain:
o
Q8. One of the angles in a triangle is 90 . What is the sum of the other two angles?
o
A. 60
o
B. 90
o
C. 120
o
D. 180
Please explain:
o
Q9. One of the angles in a triangle is 60 . What is the sum of the other two angles?
o
A. 60
o
B. 90
o
C. 120
o
D. 180
Please explain:
o
Q10. One of the angles in a triangle is 120 . What is the sum of the other two angles?
o
A. 60
o
B. 90
o
C. 120
o
D. 180
Please explain:
Q11. One of the angles in a triangle is a right angle. What is the sum of the other two angles?
o
A. 60
o
B. 90
o
C. 120
o
D. 180
Please explain:
o
Q12. One of the angles in a triangle is 90 . What kind of a triangle is this?
A. A right triangle
B. An acute triangle
C. An obtuse triangle
D. An equilateral triangle
Please explain:
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5th Grade MATH
Q13. An “obtuse” triangle has,
o
A. Two angles that are 90
o
B. One angle that is 90
C. All three angles that measure the same
o
D. One angle that is greater than 90
Please explain:
o
Q14. One of the angles in a triangle is 110 . What kind of a triangle is this?
A. A right triangle
B. An acute triangle
C. An obtuse triangle
D. An equilateral triangle
Please explain:
Q15. An “acute” triangle has,
o
A. All three angles that are less than 90
o
B. One angle that is 90
C. All three angles that measure the same
o
D. One angle that is greater than 90
Please explain:
o
Q16. All three angles in a triangle are less than 90 . What kind of a triangle is this?
A. A right triangle
B. An acute triangle
C. An obtuse triangle
D. An equilateral triangle
Please explain:
o
o
Q17. One of the angles in a triangle is 60 . The other angle is 75 . What kind of a triangle is this?
A. A right triangle
B. An acute triangle
C. An obtuse triangle
D. An equilateral triangle
Please explain:
Q18. What type of a triangle does the following figure represent?
A
A. Acute triangle
B. Obtuse triangle
C. Right triangle
D. Isosceles triangle
Angle B = 900
Right Angle
Please explain:
B
C
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5th Grade MATH
Q19. What type of a triangle does the following figure represent?
A
A. Acute triangle
B. Obtuse triangle
C. Right triangle
D. Isosceles triangle
Angle B > 900
Please explain:
B
C
Q20. What type of a triangle does the following figure represent?
A. Acute triangle
A
B. Obtuse triangle
C. Right triangle
D. Isosceles triangle
Angle A < 900
Angle B < 900
Angle C < 900
Please explain:
B
C
Q21. What type of a triangle does the following figure represent?
A. Right triangle
A
B. Obtuse triangle
C. Equilateral triangle
D. Isosceles triangle
B
Please explain:
Sides:
AB = BC = AC
C
Q22. What type of a triangle does the following figure represent?
A. Right triangle
A
B. Obtuse triangle
C. Equilateral triangle
D. Isosceles triangle
Please explain:
B
Sides:
AB = AC
But AB = BC or AC = BC
C
Q23. What type of a triangle does the following figure represent?
A. Right triangle
A
B. Scalene triangle
C. Equilateral triangle
D. Isosceles triangle
Sides:
AB = AC = BC
Please explain:
B
C
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