How to determine the angle by using measuring tape?/Finding the angle between two sides by measuring tape.

 Let us consider 3 points A, B, & C, over the land surface as shown below.

Now, we will find the angle Ө with the help of the measuring tape & without using any instruments.

Draw a line AB & BC over the ground, by using line-out powder. Otherwise, you can use a line-out string for this purpose.

Let us measure 10m. over the line BC and mark it as point D. (as shown below )

Draw a line perpendicular to line BC at point D. Let the line intersect line BA at point E.

 Measure the distance DE by using the tape. Let us consider the measured distance as 6.5m. 

Note: To draw the perpendicular line DE, we can follow the 3-4-5 method.

Go through the article 👇

👀.   Using 3-4-5 methods in construction work.

Now, 

tan Ө = [opposite side / adjacent side.]

Ө = tan⁻¹[opposite side / adjacent side.]

    = tan⁻¹[side DE / side BD]

    = tan⁻¹[6.5 / 10]

 Ө = 33.02°

Thank you for going through these calculation steps❤. Have a good day 😄.

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