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
You might like these
In simple closed curves the shapes are closed by linesegments or by a curved line. Triangle, quadrilateral, circle, etc., are examples of closed curves.
A simple closed curve or a polygon formed by three linesegments (sides) is called a triangle. The above shown shapes are triangles. The symbol of a triangle is ∆. A triangle is a polygon with three sides. In the given figure ABC is a triangle. AB, BC and CA are its sides.
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? A simple closed curve made of three or more linesegments is called a polygon. A polygon has at least three linesegments.
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
We will discuss here about measuring the line segment i.e. how to draw and measure a line segment using scale or ruler. We can measure a line segment by two ways. (i) With the help of scale
We will discuss here how to find the perimeter of a triangle. We know perimeter of a triangle is the total length (distance) of the boundary of a triangle. Perimeter of a triangle is the sum of lengths of its three sides. The perimeter of a triangle ABC Perimeter
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
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
From Mental Math on Geometrical Shapes to HOME PAGE
Didn't find what you were looking for? Or want to know more information
about Math Only Math.
Use this Google Search to find what you need.
Share this page:
What’s this?


New! Comments
Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.