Subject: Mathematics
Book: Maths Mastery
The area of a circle is given by the formula A = πr², where r is the radius—the distance from the center to the circumference. If you have a circle with radius 5 cm, its area is π × 5² = 25π cm². In practical terms, you might need to measure the space a circular rug covers or the cross-sectional area of a circular pipe. Knowing how to apply A = πr² is foundational in geometry, engineering, and architecture. Pairing this knowledge with circumference or volume formulas further expands your capability to handle circular shapes in diverse projects and daily scenarios.
What is the 7th term of the arithmetic progression 3, 6, 9, 12,...?
View QuestionIf log(100) = 2 and log(10) = 1, what is log(1000)?
View QuestionIf the sum of the angles of a polygon is 1080°, how many sides does the polygon have?
View QuestionIf the probability of an event is 1/4, what is the probability of its complement?
View QuestionIf two complementary angles differ by 30°, what are the angles?
View QuestionA sum triples in 20 years at simple interest. What is the rate of interest per annum?
View QuestionIf sin(θ) = 0.6 and θ is acute, what is cos(θ)?
View QuestionIf x:y = 4:5 and y:z = 2:3, what is x:z?
View QuestionIf sin(x) = 3/5 and x is in the first quadrant, what is cos(x)?
View QuestionThe sides of a triangle are 7, 24, and 25. Is this a right triangle?
View Question