Geometry
ICSE · Class 4 · Mathematics
Flashcards for Geometry — ICSE Class 4 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.
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Draw a line segment AB of length 6 cm. How is it different from a line?
Answer
Step 1: Use a ruler and mark point A at 0 cm. Step 2: Mark point B at 6 cm. Step 3: Draw a straight line between A and B. This is a line segment. A line segment has two endpoints (A and B) and a fixe…
If the radius of a circle is 5 cm, what is its diameter?
Answer
We know: Diameter = 2 × Radius Step 1: Radius = 5 cm Step 2: Diameter = 2 × 5 = 10 cm Answer: The diameter is 10 cm.
The diameter of a bicycle wheel is 14 cm. What is its radius?
Answer
We know: Radius = Diameter ÷ 2 Step 1: Diameter = 14 cm Step 2: Radius = 14 ÷ 2 = 7 cm Answer: The radius is 7 cm.
A circle has a radius of 9 cm. What is the length of its longest chord?
Answer
The longest chord of a circle is its diameter. Step 1: Diameter = 2 × Radius Step 2: Diameter = 2 × 9 = 18 cm Answer: The longest chord is 18 cm.
Draw two parallel lines using a ruler. How do you know they won't meet?
Answer
Step 1: Use a ruler to draw a straight line. Step 2: Keep the ruler parallel and draw another line below it. Parallel lines never meet because the distance between them remains the same at every poin…
Identify: Do the hands of a clock form intersecting lines? Why?
Answer
Yes, the hands of a clock form intersecting lines. Reason: Both hands start from the same center point (the center of the clock). Since they cross each other at that point, they are intersecting lines…
Can a line segment have more than one midpoint? Explain.
Answer
No, a line segment can have only one midpoint. Explanation: The midpoint is the point that divides the line segment into two equal parts. There is only one point that is exactly halfway between the tw…
If the diameter of a pizza is 16 cm, what is the distance from the center to the edge?
Answer
The distance from the center to the edge is the radius. Step 1: Radius = Diameter ÷ 2 Step 2: Radius = 16 ÷ 2 = 8 cm Answer: 8 cm.
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