Basic Geometrical Ideas(6th Grade > Mathematics ) Questions and Answers
Explanation:-
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Each option: 0.5 Marks
(a) ∠ ABD
(b) ∠ RTS
(c) ∠ ACD and ∠ ACB
(d) ∠ RTW and ∠ RTS
(e) ∠ AED, ∠ AEB, ∠ BEC and ∠ DEC
(f) ∠ AEC
(g) ∠ ACD
(h) ∠ AKO, ∠ AKP, ∠ BKO, ∠ BKP
Explanation:-
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Each option: 1 Mark
a) In the above figure, the three triangles are
ΔABC,ΔABD,andΔADC.
b) The seven angles are
∠ABC∠BAC∠ACB∠ADB∠ADC∠BAD∠CAD
c) The six line segments are:
¯AB,¯BD,¯DC,¯AC,¯BC,¯AD
d) The triangles which have ∠B as common are,
ΔABCandΔABD.
Explanation:-
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Definition: 1 Mark
Explanation: 1 Mark
Example: 1 Mark
A quadrilateral is a type of polygon. It has four sides.
Quadrilateral means "four sides"(quadmeans four,lateralmeans side).
It is a 2-dimensionalclosedshape and hasstraightsides.
In the quadrilateral, ABCD, here (AB, BC), (BC, CD), (CD, DA) and (DA, AB) are the adjacent side whereas (AB, CD) and (AD, BC) are the opposite sides.
The four angles are ∠ABC,∠BCD,∠CDA,∠DAB.
Explanation:-
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Line segment: 1 Mark
Ray: 1 Mark
Number of Lines segments: 1 Mark
In a line segment, the endpoints are fixed i.e. a line is contained between two points.
A ray is a portion of a line. It starts at one point and goes endlessly in one direction.
The line segments in the above figure are:
AB,AC,AD,AE,BC,BD,BE,CD,CE,DE.
Hence there 10 lines segments in the above figure.
Explanation:-
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Definition: 1 Mark
Solution: 1 Mark
A line segment is a piece,or part, of a line in geometry.
A line segment is representedby endpoints on each end of the line segment.
A line in geometry is represented by a line with arrows at each end.
A line segment and a line are different because a line goes on forever while a line segment has a distinct beginningand end.