1st Periodical Test in Mathematics 4

When looking at the corner of your classroom window, you notice it forms a perfect "L" shape. Which type of angle is this?

• Acute angle

• Right angle

• Obtuse angle

• Reflex angle

A carpenter is making a bookshelf. He needs to check if the shelf is perfectly upright by measuring the angle between the shelf and the base. The protractor shows exactly 90°. What should he conclude?

• The angle is acute, and the shelf tilts slightly.

• The angle is obtuse, and the shelf leans outward.

• The angle is right, and the shelf stands straight.

• The angle is reflex, and the shelf leans inward.

If you were designing a playground slide that must be safe and not too steep, which type of angle between the slide and the ground would you choose?

• Right angle

• Acute angle

• Obtuse angle

• Reflex angle

A triangle with three equal sides is called what?

• Scalene triangle

• Isosceles triangle

• Equilateral triangle

• Right triangle

An engineer is designing a park fountain in the shape of a square. What property of a square ensures all its corners meet perfectly?

• All sides have equal lengths.

• All angles are right angles.

• Opposite sides are parallel.

• All sides are curved.

A rectangular garden has sides measuring 12 meters and 8 meters. What is its perimeter?

• 20 m

• 40 m

• 24 m

• 96 m

A farmer wants to fence a trapezoid-shaped pen. The sides measure 6 m, 8 m, 5 m, and 7 m. How much fencing material does he need?

• 20 m

• 24 m

• 26 m

• 28 m

You need to estimate the total number of visitors to a museum in two days: 158,245 on Day 1 and 196,521 on Day 2. Which is the best estimate of the total?

• 350,000

• 354,000

• 355,000

• 360,000

What is the perimeter of a figure made by joining a square (side = 4 m) and an equilateral triangle (side = 4 m) along one side?

• 12 m

• 16 m

• 18 m

• 20 m

A figure is made by attaching a rectangle (with length = 5 m, width = 3 m) to an equilateral triangle (base = 3 m) along the width of the rectangle. What is the perimeter?

• 14 m

• 16 m

• 18 m

• 19 m