Grade 4 Math Practice Test: Angles, Lines and Measurement
- Angles, Lines and Measurement
- 12 questions
- 15 minutes
This test covers measuring and adding angles, finding unknown angles, classifying lines and triangles, lines of symmetry and converting units of length, volume, mass and time. Tip: a straight line makes a 180° angle and a square corner makes a 90° angle.
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Question 1
Through how many degrees does the minute hand of a clock turn in 15 minutes?
Correct answer: C
In 60 minutes the minute hand turns a full circle, 360°. 15 minutes is one quarter of an hour, and 360° ÷ 4 = 90°.
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Question 2
An angle measures 120°. What kind of angle is it?
Correct answer: A
An obtuse angle is greater than 90° and less than 180°, and 120° fits. An acute angle is less than 90°.
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Question 3
Angle ABD is made of two angles that do not overlap. Angle ABC measures 35° and angle CBD measures 50°. What is the measure of angle ABD?
Correct answer: B
When an angle is split into parts that do not overlap, its measure is the sum of the parts: 35° + 50° = 85°. 15° comes from subtracting instead of adding.
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Question 4
Points A, B and C lie on a straight line.
What is the measure of angle x?
Correct answer: A
Angles that together make a straight line add up to 180°, so x = 180° − 65° = 115°. 25° comes from subtracting 65° from 90° instead of 180°.
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Question 5
Angle ABC is a right angle. Ray BD divides it into two angles.
What is the measure of angle x?
Correct answer: C
A right angle measures 90°, so x = 90° − 28° = 62°. 152° comes from subtracting 28° from 180°, but angle ABC is a right angle, not a straight angle.
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Question 6
Two lines cross each other and form four right angles. What are these lines called?
Correct answer: D
Lines that meet at right angles are perpendicular. Parallel lines never meet, and rays and line segments are parts of lines.
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Question 7
How many lines of symmetry does a square have?
Correct answer: B
A square can be folded onto itself along two lines through the midpoints of opposite sides and along its two diagonals, so it has 4 lines of symmetry. A rectangle that is not a square has only 2.
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Question 8
The angles of a triangle measure 30°, 60° and 90°. What kind of triangle is it?
Correct answer: A
A triangle with one 90° angle is a right triangle. It is not acute, because not all of its angles are less than 90°.
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Question 9
A plant is 3 feet 4 inches tall. How tall is the plant in inches?
Correct answer: D
1 foot = 12 inches, so 3 feet = 36 inches. Then 36 + 4 = 40 inches. 34 comes from writing the 3 and the 4 next to each other.
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Question 10
A water bottle holds 2 liters. How many milliliters does it hold?
Correct answer: B
1 liter = 1,000 milliliters, so 2 liters = 2 × 1,000 = 2,000 milliliters.
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Question 11
A movie is 2 hours 15 minutes long. How many minutes long is the movie?
Correct answer: D
1 hour = 60 minutes, so 2 hours = 120 minutes. Then 120 + 15 = 135 minutes. 215 treats an hour as 100 minutes.
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Question 12
A bag holds 3 kilograms of flour. A baker uses 450 grams. How many grams of flour are left?
Correct answer: C
3 kilograms = 3,000 grams, and 3,000 − 450 = 2,550 grams. Change both amounts to the same unit before subtracting.
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