(Cheryl of the Clue Crew shows a triangle on the monitor.) In a triangle, a line extending from the vertex to the opposite side or base, creating a right angle, is called this
[DOC] [TLE] well - U.S. Department of Education [PAR] by the states to create the next generation of K12 standards in order to help .... 
metacognitive strategies that students may need to monitor and direct their 
thinking and ...... join these two triangles with full sides touching to make a 
rectangle?