Current location - Training Enrollment Network - Mathematics courses - The playground of the math problem experimental primary school is like this, with semicircles at both ends and a rectangle in the middle. What is the lawn area in the middle of the playground?
The playground of the math problem experimental primary school is like this, with semicircles at both ends and a rectangle in the middle. What is the lawn area in the middle of the playground?
It is known that 100m is the length of a rectangle and the width is the diameter of a semicircle minus the ring width, that is, 20×2-5×2=30m.

The area of a rectangle is 100× 30 = 3000m2.

Together, these two semicircles are a circle with the same diameter as the width of the rectangle (as mentioned above, the circle is 30 meters straight)

The area of a circle is 3. 14× (? ×30)? =706.5㎡

The total lawn area is 3000+706.5 = 3706.5m2.

Hope to adopt

Related articles
  • 20 15 how to find the value range of m, the last question in Shaoxing volume of mathematics for senior high school entrance examination?
  • The last line of high school mathematics
  • How to Cultivate Primary School Mathematics Reading Ability
  • Summary of activities of high-quality classroom teaching year
  • Knowledge points of multiplication and division of algebraic expressions
  • What should I do if I learn math worse and worse?
  • Regulations of Fuyang Municipality on the Administration of City Appearance and Environmental Sanitation (202 1 Revision)
  • Postgraduate courses in Northwest A&F University
  • Hebei senior high school entrance examination mathematics one model examination paper
  • What does pls mean in applied statistics?

    • copyright 2024 Training Enrollment Network All rights reserved