Let’s solve each question one by one, with clear explanations.
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Question 1: In a triangle, how many total degrees are there?
✔ Correct Answer: A. 180 degrees
Explanation:
This is a fundamental property of Euclidean geometry: the sum of the interior angles of any triangle is always
180 degrees, regardless of its shape or size. This holds true for all triangles — equilateral, isosceles, scalene, right, acute, or obtuse.
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Question 2: What is the name of this kind of triangle?
*(Image shows a triangle with all three sides marked with the same number of tick marks — meaning all sides are equal.)*
✔ Correct Answer: D. Equilateral
Explanation:
An
equilateral triangle has
all three sides equal in length (and therefore all three angles are also equal — each 60°). The tick marks on the sides indicate side lengths are equal. Since all three sides have matching marks, it's equilateral.
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Question 3: What is the name of this kind of triangle?
*(Image shows a triangle with a right angle symbol and two sides marked with double tick marks — meaning those two sides are equal.)*
✔ Correct Answer: C. Isosceles
Explanation:
This triangle has:
- A
right angle (90°), so it’s a
right triangle.
- Two sides marked with double ticks → those two sides are
equal in length.
A triangle with two equal sides is called an
isosceles triangle. So even though it’s also a right triangle, the question asks for “the name of this kind of triangle” based on the markings — which emphasize the
equal sides, making
Isosceles the best answer here.
> ⚠️ Note: It’s technically a
right isosceles triangle, but since “Right” is option A and “Isosceles” is option C, and the markings highlight the equal sides,
C is correct.
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Question 4: What kind of triangle is this?
*(Image shows a triangle with one clearly visible 90-degree angle — a square corner.)*
✔ Correct Answer: C. Right
Explanation:
A
right triangle is defined as a triangle that has
one 90-degree angle. The small square drawn at the vertex indicates a right angle. So this is a
right triangle.
- Acute = all angles < 90°
- Obtuse = one angle > 90°
- Right = one angle = 90°
- Robot = not a type of triangle 😄
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✔ Final Answers:
1.
A. 180 degrees
2.
D. Equilateral
3.
C. Isosceles
4.
C. Right
Let me know if you’d like help with the rest of the 20 questions!
Parent Tip: Review the logic above to help your child master the concept of triangles and quadrilaterals worksheet.
