Measure the lengths and diagonals of three squares with a ruler. Look over your measurements and try to come up with a rule of thumb for estimating the length of a diagonal if you know the length of a side.

Practice comparing shapes based on their number of sides, number of corners, and side-lengths. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Calculate certain variables of a rhombus depending on the inputs provided. Calculations include side lengths, corner angles, diagonals, height, perimeter, and area of a rhombus.

Calculate certain variables of a parallelogram depending on the inputs provided. Calculations include side lengths, corner angles, diagonals, height, perimeter, and area of parallelograms.

[Free Registration/Login Required] This flipchart provides a review of circle, rectangle, square, triangle, and hexagon and introduces trapezoid and rhombus. Students are asked to identify the number of sides and the number of corners of...

This zawiya is located at Sikkat Al-Mahgar Street to the left of the ascending street that leads to the Citadel. It has two facades, on the northwest and on the southwestern side. The northwestern facade is the main frontage of the...

Map of England, part of Scotland and Ireland during the Norman and Plantagenet Period. Shows major cities of the time, major river ways, topography, political boundaries. Scale in English miles. Insert of Ireland in right upper corner of...

Side-wheel paddle steamboat; built in 1890 by the San Francisco and North Pacific Railroad Company; preserved at the San Francisco Maritime National Historical Park. Official plaque located in the San Francisco Maritime National...