Triangular Pyramid

A triangular pyramid is a polyhedron that has a triangular base and three triangular faces that meet at a common point called the apex. The triangular pyramid is also known as a tetrahedron. It is a type of pyramid because it has a base and triangular faces that extend from the base to a single point at the top.

The base of a triangular pyramid is a triangle, and the three faces are also triangles. The edges of the base triangle are called the base edges, and the edges that extend from the apex to the vertices of the base triangle are called the lateral edges. The point where the lateral edges meet is the apex of the pyramid.

To find the surface area of a triangular pyramid, you can use the formula:

S = ½ * (perimeter of base * slant height) + base area

To find the volume of a triangular pyramid, you can use the formula:

V = ⅓ * (area of base * height)

Understanding the properties and formulas of a triangular pyramid can help in solving problems related to geometry and spatial reasoning.

Overall, a triangular pyramid is a three-dimensional shape with a triangular base and three triangular faces that meet at a common point, forming a pyramid structure.

◂Math Worksheets and Study Guides Third Grade. Measurement

Measuring Line Segments

Vocabulary/Answer key

Measurement

Vocabulary/Answer key

Measurement

The resources above cover the following skills:

Measurement (NCTM)

Understand measurable attributes of objects and the units, systems, and processes of measurement.

Understand such attributes as length, area, weight, volume, and size of angle and select the appropriate type of unit for measuring each attribute.

Understand that measurements are approximations and how differences in units affect precision.

Apply appropriate techniques, tools, and formulas to determine measurements.

Select and apply appropriate standard units and tools to measure length, area, volume, weight, time, temperature, and the size of angles.

Connections to the Grade 3 Focal Points (NCTM)

Measurement: Students in grade 3 strengthen their understanding of fractions as they confront problems in linear measurement that call for more precision than the whole unit allowed them in their work in grade 2. They develop their facility in measuring with fractional parts of linear units. Students develop measurement concepts and skills through experiences in analyzing attributes and properties of two-dimensional objects. They form an understanding of perimeter as a measurable attribute and select appropriate units, strategies, and tools to solve problems involving perimeter.