This article has been viewed 686,467 times. This article has been fact-checked, ensuring the accuracy of any cited facts and confirming the authority of its sources. There are 9 references cited in this article, which can be found at the bottom of the page. Additionally, David has worked as an instructor for online videos for textbook companies such as Larson Texts, Big Ideas Learning, and Big Ideas Math. After attaining a perfect 800 math score and a 690 English score on the SAT, David was awarded the Dickinson Scholarship from the University of Miami, where he graduated with a Bachelor’s degree in Business Administration. The isosceles triangle area formula is given as, A b h (where A refers to the area of the triangle, b refers to the base, and h refers to the height. When the base and height/ altitude of the triangle are given, then the isosceles triangle area can be found by using the formula A 1/2 × base (b) × height (h. With over 10 years of teaching experience, David works with students of all ages and grades in various subjects, as well as college admissions counseling and test preparation for the SAT, ACT, ISEE, and more. The area of an isosceles triangle can be derived by using Heron's formula: Area (A) b/4(4a 2 - b 2), where a is the length of the equal side and b is the base of the triangle. THEN the whole area is bh, which is for both triangles, so just one is × bh. David Jia is an Academic Tutor and the Founder of LA Math Tutoring, a private tutoring company based in Los Angeles, California. This article was co-authored by David Jia.
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