All PSAT Math Resources
Example Questions
Example Question #256 :Psat Mathematics
Aregular tetrahedronhas four congruent faces, each of which is an equilateral triangle.
A given tetrahedron has edges of length six inches. Give the total surface area of the tetrahedron.
Possible Answers:
Correct answer:
Explanation:
The area of an equilateral triangle is given by the formula
Since there are four equilateral triangles that comprise the surface of the tetrahedron, the total surface area is
Substitute:
square inches.
Example Question #257 :Psat Mathematics
Give the surface area of the abovetetrahedron, or four-faced solid, to the nearest tenth.
Possible Answers:
Insufficient information is given to answer the question.
Correct answer:
Explanation:
The tetrahedron has four faces, each of which is an equilateral triangle with sidelength 7. Each face has area
The total surface area is four times this, or about.
Rounded, this is 84.9.
Jonathan
Certified Tutor
Certified Tutor
Davidson College, Bachelor of Science, Psychology. Wake Forest University, Masters in Business Administration, Business Admin...
Mike
Certified Tutor
Certified Tutor
Concordia University-Ann Arbor, Master of Arts Teaching, Mathematics Teacher Education.
All PSAT Math Resources
Popular Subjects
SSAT Tutors in Dallas Fort Worth,Algebra Tutors in New York City,SSAT Tutors in Boston,Biology Tutors in San Diego,称MCATTutors in Phoenix,Math Tutors in Boston,LSAT Tutors in Miami,SSAT Tutors in Atlanta,LSAT Tutors in Houston,阅读导师在洛杉矶
Popular Courses & Classes
SAT Courses & Classes in San Diego,ISEE Courses & Classes in Seattle,称MCATCourses & Classes in Atlanta,西班牙语课程&Classes in Seattle,ACT Courses & Classes in San Francisco-Bay Area,ACT Courses & Classes in Boston,西班牙语课程&Classes in Dallas Fort Worth,GMAT Courses & Classes in Boston,SSAT Courses & Classes in Denver,称MCATCourses & Classes in Houston
Popular Test Prep
ACT Test Prep in San Diego,SSAT Test Prep in Phoenix,ISEE Test Prep in Boston,GRE Test Prep in Los Angeles,GMAT Test Prep in Atlanta,GRE Test Prep in Seattle,GMAT Test Prep in Washington DC,SSAT Test Prep in Washington DC,ISEE Test Prep in San Francisco-Bay Area,SAT Test Prep in Phoenix