Question
Find the length of the side of a regular octagon which is formed by cutting the corner of square of side 20 cm?
Let the sides of regular octagon be a. a² = x² + x² a² = 2x² x² = a²/2 x = a/√2 x + a/√2 + a = 20 a/√2 + a/√2 + a = 20 a(√2+1) = 20 ∴ a = 20/(√2+1) ⇒ a = 20(√2-1)More Geometry Questions
- ABCD is a cyclic quadrilateral, such that ratio of measures ∠A, ∠B and ∠C is 1 : 4 : 5, then the measure of ∠D is?
- In ∆ABC, AB = 5cm, BC = 10cm, and AC = 13cm then find out the value of cos A.
- A regular polygon has an interior angle of 144°. How many sides does the polygon have?
- The volume (in cu.cm.) of a right circular cylinder with radius 1 cm and height 2 cm on is: (Take π = 22/7)
- ∆ABC and ∆DEF are similar and their areas are respectively 25 cm2 and 36 cm 2 . If EF = 7.2 cm BC is?
- Find the difference between angle and its complement if the angle is five-thirteenth of its complement.
- One of the angles of a quadrilateral is 80º. If ratio of remaining angles of quadrilateral is 6:3:5 respectively, then find the smallest angle of quadrilat...
- If the area and sum of parallel side of a trapezium are 96 cm² and 96cm respectively. Then the distance between the parallel sides is.
- Find the area of triangle having sides 7 m, 24 m, and 25 m.
- A triangular field has sides 13 m, 14 m, and 15 m. A well with a diameter of 7 m is dug outside the field. If the entire soil dug from the well is used to ...
Relevant for Exams:
Hey! Ask a query
Please enter email id
The email must be a valid email address.
Please enter Mobile Number
Please enter valid Mobile Number
Please enter your Doubt
Think You're Ready for RBI Grade B?
RBI Grade B 2026 Phase 1 Memory Based Paper
- 200 Questions with Detailed Solutions
- Section-wise Coverage (GA, English, Quant & Reasoning)