Geometri dan Pengukuran Practice Questions
UN (Indonesia) · UN Matematika · 131 free MCQs with instant results and detailed explanations.
131
Total
34
Easy
72
Medium
25
Hard
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Sample Questions from Geometri dan Pengukuran
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Q1
Easy
If a triangle has a base of 10 cm and a height of 6 cm, what is its area?
A.
30 cmยฒ
B.
60 cmยฒ
C.
20 cmยฒ
D.
40 cmยฒ
Show Answer & Explanation
Correct Answer: A
The area of a triangle is given by the formula Area = 1/2 ร Base ร Height. Thus, Area = 1/2 ร 10 cm ร 6 cm = 30 cmยฒ.
Q2
Easy
What is the perimeter of a rectangle with length 8 cm and width 3 cm?
A.
22 cm
B.
24 cm
C.
26 cm
D.
20 cm
Show Answer & Explanation
Correct Answer: A
The perimeter of a rectangle is calculated using the formula P = 2(length + width). Here, P = 2(8 + 3) = 2(11) = 22 cm.
Q3
Easy
If the area of a triangle is 30 cmยฒ and the base is 10 cm, what is the height?
A.
6 cm
B.
5 cm
C.
3 cm
D.
10 cm
Show Answer & Explanation
Correct Answer: A
The area of a triangle is given by the formula Area = 1/2 ร base ร height. Rearranging gives height = 2 ร Area / base = 2 ร 30 / 10 = 6 cm.
Q4
Medium
A right triangle has legs measuring 6 cm and 8 cm. What is the length of the hypotenuse?
A.
10 cm
B.
12 cm
C.
14 cm
D.
16 cm
Show Answer & Explanation
Correct Answer: A
In a right triangle, the Pythagorean theorem states that the square of the hypotenuse is equal to the sum of the squares of the other two sides. Thus, cยฒ = 6ยฒ + 8ยฒ = 36 + 64 = 100, so c = โ100 = 10 cm.
Q5
Medium
What is the area of a triangle with a base of 10 cm and a height of 5 cm?
A.
25 cmยฒ
B.
50 cmยฒ
C.
15 cmยฒ
D.
35 cmยฒ
Show Answer & Explanation
Correct Answer: A
The area of a triangle is calculated using the formula: Area = (base ร height) / 2. Here, Area = (10 cm ร 5 cm) / 2 = 50 cmยฒ / 2 = 25 cmยฒ.
Q6
Medium
If the radius of a circle is doubled, how does the area of the circle change?
A.
It doubles
B.
It triples
C.
It quadruples
D.
It remains the same
Show Answer & Explanation
Correct Answer: C
The area of a circle is given by A = ฯrยฒ. If the radius is doubled, the new area becomes A = ฯ(2r)ยฒ = 4ฯrยฒ, which is four times the original area.
Q7
Medium
A right-angled triangle has legs of lengths 6 cm and 8 cm. What is the length of the hypotenuse?
A.
10 cm
B.
12 cm
C.
14 cm
D.
15 cm
Show Answer & Explanation
Correct Answer: A
Using the Pythagorean theorem, the length of the hypotenuse c is given by cยฒ = aยฒ + bยฒ. Here, cยฒ = 6ยฒ + 8ยฒ = 36 + 64 = 100, so c = โ100 = 10 cm.
Q8
Hard
A cylindrical water tank has a radius of 3 meters and a height of 4 meters. What is the volume of water the tank can hold?
A.
36ฯ cubic meters
B.
12ฯ cubic meters
C.
24ฯ cubic meters
D.
18ฯ cubic meters
Show Answer & Explanation
Correct Answer: A
The volume V of a cylinder is calculated using the formula V = ฯrยฒh. Here, r = 3 meters and h = 4 meters, so V = ฯ(3)ยฒ(4) = 36ฯ cubic meters.
Q9
Hard
A triangle has sides of lengths 7 cm, 24 cm, and 25 cm. What type of triangle is it?
A.
Scalene Triangle
B.
Isosceles Triangle
C.
Right Triangle
D.
Equilateral Triangle
Show Answer & Explanation
Correct Answer: C
To determine the type of triangle, check if it satisfies the Pythagorean theorem. Here, 7ยฒ + 24ยฒ = 49 + 576 = 625, which equals 25ยฒ. Hence, it is a right triangle.
Q10
Hard
In a triangle, if the lengths of two sides are 7 cm and 12 cm, what is the maximum possible length of the third side?
A.
18 cm
B.
19 cm
C.
20 cm
D.
22 cm
Show Answer & Explanation
Correct Answer: A
According to the triangle inequality theorem, the sum of the lengths of any two sides must be greater than the length of the third side. Therefore, the maximum length of the third side can be calculated as (7 cm + 12 cm - 1 cm) = 18 cm.
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Geometri dan Pengukuran โ UN (Indonesia) UN Matematika Practice Questions Online
This page contains 131 practice MCQs for the chapter Geometri dan Pengukuran in UN (Indonesia) UN Matematika. The questions are organized by difficulty โ 34 easy, 72 medium, 25 hard โ so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.