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GeoGebraGeoGebra Classroom

Polygon Similarity

Scale

Are the two triangles similar? How do you know? List the corresponding parts and the scale factor from DEF to ABC.

Prove whether or not the quadrilaterals are similar. If they are what is the scale factor?

Prove whether or not the quadrilaterals are similar. If they are find the measurement of EF and identify what property EF shows for ABE.

Real world

You bought a house with a pool. You had a kiddie pool at your old place that was 3 feet by 9 feet and 2 feet deep. It took about 20 minutes to fill that pool. The the new pool is 10 feet by 30 feet and an average of 6 feet 8 inches deep. How much more water will the new pool need compared to the kiddie pool? How long will it take to fill it if it's empty when you arrive for move in day?