Geometry

posted by .

My class is learning about the areas of regular polygons and circles and I'm so confused. How are you supposed to figue out the area a regular triangle inscribed in a circle when all you know is that the radius of the circle is 1.5?

  • Geometry -

    If it is a rt triangle occupying less
    that i/2 of the circle:
    At = 2As,
    As = At/2.

    At = Area of the triangle.

    As = A shaded area between triangle and
    circle.

    At + As = pi*r^2/2 = 1/2 of a circle.
    Substitute At/2 for As:
    At + At/2 = 3.14*(1.5)^2/2,
    1.5At = 3.53,
    At = 2.36. = Area of triangle.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. help hexagon geometry

    A regular hexagon is inscribed in a circle and another regular hexagon is circumscribed about the same circle. What is the ratio of the area of the larger hexagon to the area of the smaller hexagon?
  2. statistics

    What is your conclusion based on the following data?
  3. College Geometry

    In this assignment, you examine a process that links polygons and circles. You will reach some quantitative conclusions about their respective areas and the relationship between the two. As you know, a regular polygon has sides of …
  4. GEOMETRY

    A. A regular hexagon with a perimeter of 24 units is inscribed in a circle. Find the radius of the circle. B . Find a relationship between the areas of triangle ADC and parallelogram ABCD this is our assignment for tomorrow . . its …
  5. GEOMETRY CIRCLES PLEASE

    1.An isosceles triangle with each leg measuring 13 cm is inscribed in a circle . if the altitude to the base is 12 cm find the radius of the circle 2. Circles a and b are tangent at point c. p is on circle a and q is on circle b such …
  6. GEOMETRY CIRCLES PLEASE

    HELP ME PLEASE. 1.An isosceles triangle with each leg measuring 13 cm is inscribed in a circle . if the altitude to the base is 12 cm find the radius of the circle 2. Circles a and b are tangent at point c. p is on circle a and q is …
  7. math

    A circle is inscribed in triangle ABC with sides a, b, c. Tangents to the circle parallel to the sides of the triangle are constructed. Each of these tangents cuts off a triangle from ∆ABC. In each of these triangles, a circle …
  8. math

    Identify two regular and two irregular polygons in your home or community. How do you know they are regular or irregular?
  9. Math Help Please ASAP

    I need someone to write this out for me like in a discussion so I can read it and write it in my own words please ASAP! Identify two regular and two irregular polygons in your home or community. How do you know they are regular or …
  10. math(Help me plz)

    Identify two regular and two irregular polygons in your home or community. How do you know they are regular or irregular?

More Similar Questions