Q&A for How to Draw Pyramids

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  • Question
    How can I find the surface area of a pyramid?
    Grace Imson, MA
    Math Teacher
    Grace Imson is a math teacher with over 40 years of teaching experience. Grace is currently a math instructor at the City College of San Francisco and was previously in the Math Department at Saint Louis University. She has taught math at the elementary, middle, high school, and college levels. She has an MA in Education, specializing in Administration and Supervision from Saint Louis University.
    Math Teacher
    Expert Answer
    To find the surface area of a pyramid, start by calculating the area of the base and the lateral sides. The area of the base is simply the area of the geometric shape forming the base, such as a square, rectangle, or triangle. Next, determine the number of lateral sides, which corresponds to the number of faces of the pyramid. For most pyramids, these lateral sides are triangular. To calculate the area of each triangular lateral side, identify a triangle that intersects a vertex at the top of the pyramid. Define 'H' as the perpendicular distance from this vertex to the center of the base of the pyramid. If the height of the pyramid is given, use this information to find the lateral height, which is the slanted height along the surface of the lateral side. Apply the Pythagorean Theorem to find the lateral height. If the base of the pyramid is a regular polygon, such as a square or equilateral triangle, the lateral sides are also triangular. However, if the base is irregular, the lateral sides may not be uniform triangles, and each lateral side would need to be treated individually. In summary, to find the surface area of a pyramid, calculate the area of the base and add it to the total area of the lateral sides, which involves finding the area of each lateral side and summing them all together.
  • Question
    How do I draw a three-dimensional pyramid?
    Community Answer
    1.) Draw a triangle. 2.) Find it's middle point (connect each corner with the middle of the side it faces). 3.) Draw a straight line up from the middle point. 4.) Connect each corner of the triangle to the top of this line.
  • Question
    How many faces edges and verticals does a square based pyramid have?
    Mia Forte
    Community Answer
    A square based pyramid will have one square face on the bottom and four diagonal faces (one for each side).
  • Question
    Are there any safe alternates to the compass? I have a child who would like to try this.
    Community Answer
    You don't really need the compass. It's easier by drawing a triangle, a line up from the bottom right corner, and connecting the top corner to the end of that line with another. You could also put a cap eraser over the pointy end of the compass.
  • Question
    How do I draw a rectangular prism?
    Community Answer
    You can draw a rectangular prism just like drawing a 3-dimensional cube. First draw a rectangle and indicate the middle of the shape with a small but visible dot. Draw another rectangle of the same size using the dot as one of your corners. Connect the four corners of one rectangle with the corresponding corners of the other, and you're done!
  • Question
    How many edges does a square based pyramid have?
    Community Answer
    A polygon is a closed, flat shape with straight sides. A square pyramid has a square for a base and four triangles for sides. This means it has five vertices, or corners, and eight edges.
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