Mental Math on Geometrical Shapes
In mental math on geometrical shapes we will solve different type of problems on simple closed curves, polygons, basic geometrical concepts, perpendicular lines, parallel lines, circle, terms relates to circle, relation between radius and diameter of a circle, symmetry, and line of symmetry.
1. Is ray AB different from ray BA?
2. Are all the quadrilaterals rectangles?
3. Is a circle a polygon?
4. Is a triangle a simple closed figure?
5. The diameter is the longest chord of a circle. Is it true?
6. A line has two and points. Yes or No?
7. The radius is double the diameter. Is it true?
8. The radius is also a chord of the circle. Is it true?
Answer:
1. Yes
2. No
3. No
4. Yes
5. Yes
6. No
7. False
8. False
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In circle math the terms related to the circle are discussed here. A circle is such a closed curve whose every point is equidistant from a fixed point called its centre. The symbol of circle is O. We have learned to draw a circle, by tracing the outlines of objects like a
What is a Polygon? | Simple Closed Curve | Triangle | Quadrilateral
What is a polygon? A simple closed curve made of three or more line-segments is called a polygon. A polygon has at least three line-segments.
Symmetrical Shapes | One, Two, Three, Four & Many-line Symmetry
Symmetrical shapes are discussed here in this topic. Any object or shape which can be cut in two equal halves in such a way that both the parts are exactly the same is called symmetrical. The line which divides the shape is called the symmetry. So, if we place a mirror
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We will discuss here how to find the perimeter of a rectangle. We know perimeter of a rectangle is the total length (distance) of the boundary of a rectangle. ABCD is a rectangle. We know that the opposite sides of a rectangle are equal. AB = CD = 5 cm and BC = AD = 3 cm
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We will discuss here how to find the perimeter of a square. Perimeter of a square is the total length (distance) of the boundary of a square. We know that all the sides of a square are equal. Perimeter of a Square Perimeter of the square ABCD = AB+BC+CD+AD=2 cm+2cm+2cm+2cm
4th Grade Math Activities
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