ICSE Class 7 Answered

30 degree with compas and ruler

Asked by dbnd.123 | 30 Aug, 2018, 02:10: PM

Expert Answer

begin mathsize 16px style To space construct space an space angle space of space 30 degree comma space first space construct space straight a space 60 degree space angle space and space then space bisect space it. As space we space know space that space angles space in space an space equilateral space triangle space are space all space 60 degree space in space size. means space to space construct space 60 degree space angle comma space we space have space to space construct space an space equilateral space triangle. Follow space the space below space steps space to space construct space an space equilateral space triangle. 1. space Draw space straight a space ray space AB. 2. space Place space the space poiny space of space the space compass space at space straight A space and space draw space an space arc space that space passes space through space straight B. 3. space Place space the space point space of space the space compass space at space straight B space and space draw space an space arc space that space passes space through space straight A. Let space this space arc space cut space the space arc space drawn space in space 2 to the power of nd space step space at space straight C. 4. space Join space straight A space to space straight C. space the space angle space BAC space is space 60 degree comma space as space the space triangle ABC space is space an space equilateral space triangle. We space know space 1 half cross times space 60 degree space equals space 30 degree 5. space With space the space point space of space the space compass space still space at space straight B comma space draw space an space arc space straight D. 6. space With space the space poiny space of space the space compass space at space straight C comma space draw space an space arc space to space cut space the space arc space drawn space in space step space 5 space at space straight D. 7. space Join space straight D space to space straight A. space The space angle space BAD space is space 30 degree. end style

Answered by Yasmeen Khan | 30 Aug, 2018, 06:00: PM

ICSE Class 7 Answered

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ICSE Class 7 Answered

Application Videos

Algebraic Identities

Expansion using Algebraic Identities_2

Expansion using Algebraic Identities_1

Concept Videos

Construction of Rhombus

Construction of squares and rectangles

Pair of Lines

Surface Area: Cubes and Cuboids

Construction of Parallel Lines

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